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Publications


Journals

U. Hahn, K.B. Cohen, Y. Garten & N. Shah, Mining the Pharmacogenomics Literature: A Survey of the State of the Art, In: Briefings in Bioinformatics, Vol. 13, 2012, No.4, pp. 460-494.

R. Altwasser, J. Linde, E. Buyko, U. Hahn, R. Guthke, Genome-wide Scale-free Network Inference for Candida albicans, In: Frontiers in Microbiology, Vol. 3, 2012, No. 51.

E. Beisswanger & U. Hahn, Towards Valid and Reusable Reference Alignments: Ten Basic Quality Checks for Ontology Alignments and Their Application to Three Different Reference Data Sets, In: Journal of Biomedical Semantics, Vol. 3, 2012, Supplement 1: S4.

Y. Kano, J. Bjorne, F. Ginter, T. Salakoski, E. Buyko, U. Hahn, K.B. Cohen, K. Verspoor, C. Roeder, L.E. Hunter, H. Kilicoglu, S. Bergler, S. van Landeghem, T. van Parys, Y. van de Peer, M. Miwa, S. Ananiadou, M. Neves, A. Pascual-Montano, A. Ozgur, D.R. Radev, S. Riedel, R. Saetre, H.W. Chun, J.D. Kim, S. Pyysalo, T. Ohta, & J'i. Tsujii, U-Compare Bio-event Meta-service: Compatible BioNLP Event Extraction Services, In: BMC Bioinformatics, Vol. 12, 2011: 481

E. Buyko, E. Faessler, J. Wermter & U. Hahn, Syntactic Simplification and Semantic Enrichment - Trimming Dependency Graphs for Event Extraction,
In: Computational Intelligence, Vol. 27, 2011, No.4 (Nov), pp. 610-644.

D. Rebholz-Schuhmann, A.J.J. Yepes, E.M. van Mulligen, N. Kang, J. Kors, D. Milward, P. Corbett, E. Buyko, E. Beisswanger & U. Hahn
The CALBC Silver Standard Corpus: Harmonizing Multiple Semantic Annotations in a Large Biomedical Corpus
In: Journal of Bioinformatics and Computational Biology, Vol. 8, 2010, No.1, pp.163-179.

D. DeLuca, E. Beisswanger, J. Wermter, P. Horn, U. Hahn & R. Blasczyk, MaHCO: An Ontology of the Major Histocompatibility Complex for Immunoinformatic Applications and Text Mining, In: Bioinformatics, Vol. 25, 2009, No. 16, pp.2064-2070

J. Wermter, K. Tomanek & U. Hahn, High-Performance Gene Name Normalization with GeNo, In: Bioinformatics, Vol. 25, 2009, No. 6, pp. 815-821.

E. Beisswanger, S. Schulz, H. Stenzhorn & U. Hahn, BioTop: An Upper Domain Ontology for the Life Sciences - A Description of Its Current Structure, Contents, and Interfaces to OBO Ontologies, In: Applied Ontology, Vol. 3, 2008, No. 4, pp.205-212.

R. Altman, C. Bergman, J. Blake, C. Blaschke, A. Cohen, F. Gannon, L. Grivell, U. Hahn, W. Hersh, L. Hirschman, L.J. Jensen, M. Krallinger, B. Mons, S.I. O'Donoghue, M. Peitsch, D. Rebholz-Schumann, H. Shatkay, A. Valencia, Text Mining for Biology: The Way Forward. Opinions from Leading Scientists, In: Genome Biology, Vol. 9, 2008, S7

U. Hahn, J. Wermter, R. Blasczyk & P. Horn, Text Mining: Powering the Database Revolution, In: Nature, Vol. 448, 2007, No. 7150 (July 12, 2007), p.130.

S. Schulz, K. Marko & U. Hahn, Spatial Location and its Relevance for Terminological Inferences in Bio-Ontologies, In: BMC Bioinformatics, Vol. 8, 2007, No. 134

S. Schulz & U. Hahn, Towards the Ontological Foundations of Symbolic Biological Theories, In: Artificial Intelligence in Medicine, Vol. 39, 2007, No. 3, pp.237-250.

S. Schulz, S. Hanser, U. Hahn & J. Rogers, The Semantics of Procedures and Diseases in SNOMED® CT, In: Methods of Information in Medicine, Vol. 45, 2006, No.4, pp.354-358.

K. Markó, S. Schulz & U. Hahn, Automatic Lexeme Acquisition for a Multilingual Medical Subword Thesaurus, In: International Journal of Medical Informatics, Vol. 76, 2006, Nos.2-3 (Feb/Mar), pp.184-189.

C. Fellbaum, U. Hahn & B. Smith, Towards New Information Resources for Public Health - From WordNet to Medical WordNet, In: Journal of Biomedical Informatics, Vol. 39, 2006, No.3, pp.321-332.

S. Schulz & U. Hahn, Part-Whole Representation and Reasoning in Formal Biomedical Ontologies, In: Artificial Intelligence in Medicine, Vol. 34, 2005, No.3, pp.179-200.

K. Markó, S. Schulz & U. Hahn, MorphoSaurus - Design and Evaluation of an Interlingua-Based, Cross-Language Document Retrieval Engine for the Medical Domain, In: Methods of Information in Medicine, Vol. 44, 2005, No.4, pp.537-545.

U. Hahn, Turning Informal Thesauri into Formal Ontologies: A Feasibility Study on Biomedical Knowledge Re-use, In: Comparative and Functional Genomics, Vol. 4, 2003, No.1, pp.94-97.

U. Hahn, M. Romacker & S. Schulz, medSynDiKATe: A Natural Language System for the Extraction of Medical Information from Findings Reports, In: International Journal of Medical Informatics, Vol. 67, 2002, Nos.1-3, pp.63-74.

U. Hahn & K. Markó, An Integrated, Dual Learner for Grammars and Ontologies, In: Data and Knowledge Engineering, Vol. 42, 2002, No.3, pp.273-291.

K. Markert & U. Hahn, Understanding Metonymies in Discourse, In: Artificial Intelligence, Vol. 135, 2002, Nos. 1-2, pp.145-198.

S. Schulz & U. Hahn, Medical Knowledge Reengineering: Converting Major Portions of the UMLS into a Terminological Knowledge Base, In: International Journal of Medical Informatics, Vol. 64, 2001, Nos. 2-3, pp.207-221.

U. Hahn & I. Mani, The Challenges of Automatic Summarization, In: IEEE Computer, Vol. 33, 2000, No. 11, pp.29-36.

S. Schulz & U. Hahn, Morpheme-Based, Cross-Lingual Indexing for Medical Document Retrieval, In: International Journal of Medical Informatics, Vol. 59, 2000, No. 3, pp.87-99.

U. Hahn, M. Romacker & S. Schulz, Content Management in the SynDiKATe System: How Technical Documents are Automatically Transformed to Text Knowledge Bases, In: Data and Knowledge Engineering, Vol. 35, 2000, No. 2, pp.137-159.

M. Strube & U. Hahn, Functional Centering: Grounding Referential Coherence in Information Structure, In: Computational Linguistics, Vol. 25, 1999, No. 3, pp.309-344.

U. Hahn, S. Schulz & M. Romacker, Part-Whole Reasoning: A Case Study in Medical Ontology Engineering, In: IEEE Intelligent Systems & their Applications, Vol. 14, 1999, No. 5, pp. 59-67.

U. Hahn, M. Romacker & S. Schulz, How Knowledge Drives Understanding: Matching Medical Ontologies with the Needs of Medical Language Processing, In: Artificial Intelligence in Medicine, Vol. 15, 1999, No. 1, pp.25-51.

U. Hahn, M. Romacker & S. Schulz, Discourse Structures in Medical Reports - Watch out! The Generation of Referentially Coherent and Valid Text Knowledge Bases in the medSynDiKATe System, In: International Journal of Medical Informatics, Vol. 53, 1999, No.1, pp.1-28.

U. Hahn, S. Schacht & N. Bröker, Concurrent, Object-Oriented Natural Language Parsing: The ParseTalk Model, In: International Journal of Human-Computer Studies, Vol. 41, 1994, Nos. 1/2, pp.179-222.

U. Hahn, M. Jarke & Th. Rose, Teamwork Support in a Knowledge-Based Information Systems Environment, In: IEEE Transactions on Software Engineering, SE-17, 1991, No. 5, pp.467-482.

U. Hahn, Topic Parsing: Accounting for Text Macro Structures in Full-Text Analysis, In: Information Processing & Management, Vol. 26, 1990, No. 1, pp.135-170.

U. Hahn, Making Understanders out of Parsers: Semantically Driven Parsing as a Key Concept for Realistic Text Understanding Applications, In: International Journal of Intelligent Systems, Vol. 4, 1989, No. 3, pp.345-393.

U. Reimer & U. Hahn, On Formal Semantic Properties of a Frame Data Model, In: Computers and Artificial Intelligence, Vol. 4, 1985, No. 4, pp.335-351.

Collected Volumes

U. Hahn & J. Wermter, Levels of Natural Language Processing for Text Mining, In: S. Ananiadou & J. McNaught (Eds.), Text Mining for Biology and Biomedicine. Boston, London: Artech House Books, 2006, pp.13-41.

U. Hahn & S. Schulz, Building a Very Large Ontology from Medical Thesauri, In: S. Staab & R. Studer (Eds.), Handbook on Ontologies. Berlin, Heidelberg: Springer, 2004, pp.133-150

U. Hahn, Die Verdichtung textuellen Wissens zu Information: Vom Wandel methodischer Paradigmen beim automatischen Abstracting [Condensating textual knowledge to information: the change of methodological paradigms in automatic abstracting], In: R. Hammwöhner, M. Rittberger & W. Semar (Eds.), Wissen in Aktion. Der Primat der Pragmatik als Motto der Konstanzer Informationswissenschaft. Festschrift für Rainer Kuhlen. Universitätsverlag Konstanz, 2004, pp.51-68 (Schriften zur Informationswissenschaft, 41).

U. Hahn, Was war? - Erste explorative Daten zum Ranking der deutschen Computerlinguistik im internationalen und nationalen Wettbewerb [Preliminary explorative data on the ranking of computational linguistics in Germany within the context of international and national competition], In: G. Willée, B. Schröder & H.-C. Schmitz (Eds.), Computerlinguistik - Was geht, was kommt? Computational Linguistics - Achievements and Perspectives. Festschrift für Winfried Lenders. Gardez!, 2002, pp.100-108 (Sprachwissenschaft, Computerlinguistik und Neue Medien, 4).

U. Hahn, N. Bröker & P. Neuhaus, Let's ParseTalk: Message-Passing Protocols for Object-Oriented Parsing, In: H. Bunt & A. Nijholt (Eds.), Advances in Probabilistic and Other Parsing Technologies. Kluwer, 2000, pp.177-201 (Text, Speech and Language Technology Series, 16).

U. Hahn & U. Reimer, Knowledge-Based Text Summarization: Salience and Generalization Operators for Knowledge Base Abstraction, In: I. Mani & M. T. Maybury (Eds.), Advances in Automatic Text Summarization. MIT Press, 1999, pp.215-232.

N. Bröker, M. Strube, S. Schacht & U. Hahn, Coarse-Grained Parallelism in Natural Language Understanding: Parsing as Message Passing, In: D. B. Jones & H. L. Somers (Eds.), New Methods in Language Processing. UCL Press, 1997, pp.301-317.

N. Bröker, S. Schacht, P.Neuhaus & U. Hahn, Performanzorientiertes Parsing und Grammatik-Design: das ParseTalk-System [Performance-oriented parsing and grammar design: the ParseTalk system], In: C. Habel, S. Kanngießer & G. Rickheit (Eds.), Perspektiven der Kognitiven Linguistik. Modelle und Methoden. Westdeutscher Verlag, 1996, pp.79-125.

U. Hahn, Distributed Text Structure Parsing: Computing Thematic Progressions in Expository Texts, In: G. Rickheit & C. Habel (Eds.), Focus and Coherence in Discourse Processing. W. de Gruyter, 1995, pp.214-250 (Research in Text Theory, 22).

U. Hahn, An Actor Model of Distributed Natural Language Parsing, In: G. Adriaens & U. Hahn (Eds.), Parallel Natural Language Processing. Ablex, 1994, pp.307-349.

U. Hahn & G. Adriaens, Parallel Natural Language Processing: Background and Overview, In: G. Adriaens & U. Hahn (Eds.), Parallel Natural Language Processing. Ablex, 1994, pp.1-134.

U. Hahn, S. Schacht & N. Bröker, Verteiltes Parsing natürlicher Sprache [Distributed Parsing of Natural Language], In: J. Müller (Ed.), Verteilte Künstliche Intelligenz. Methoden und Anwendungen. B.I. Wissenschaftsverlag, 1993, pp.298-310.

U. Hahn, M. Jarke, S. Eherer & K. Kreplin, CoAUTHOR: A Hypermedia Group Authoring Environment, In: J.M. Bowers & S.D. Benford (Eds.), Studies in Computer Supported Cooperative Work: Theory, Practice and Design. North-Holland, 1991, pp.79-100 (Human Factors in Information Technology, 8).

U. Hahn & U. Reimer, Semantic Parsing and Summarizing of Technical Texts in the TOPIC System, In: R. Kuhlen (Ed.), Informationslinguistik. Theoretische, experimentelle, curriculare und pro-gnostische Aspekte einer informationswissenschaftlichen Teildisziplin. M. Niemeyer, 1986, pp.153-193 (Sprache und Information, 15).

Proceedings

Dietrich Rebholz-Schuhmann, Simon Clematide, Fabio Rinaldi, Senay Kafkas, Erik M. van Mulligen, Chinh Bui, Johannes Hellrich, Ian Lewin, David Milward, Michael Poprat, Antonio Jimeno-Yepes, Udo Hahn & Jan A. Kors, Entity Recognition in Parallel Mulit-lingual Biomedical Corpora: The CLEF-ER Laboratory Overview, In: P. Forner,  H. Müller, R. Paredes, P. Rosso & B. Stein (Eds.), Information Access Evaluation. Multilinguality, Multimodality, and Visualization - 4th International Conference of the CLEF Initiative, CLEF 2013, Valencia, Spain, September 23-26, 2013. Berlin etc.: Springer, 2013, pp. 353-367 (Lecture Notes in Computer Science, 8138).

U. Hahn, E. Beisswanger, E. Buyko, E. Faessler, J. Traumüller, S. Schröder & K. Hornbostel, Iterative Refinement and Quality Checking of Annotation Guidelines: How to Deal Effectively with Semantically Sloppy Named Entity Types, such as Pathological Phenomena, In: LREC 2012 - Proceedings of the 8th International Conference on Language Resources and Evaluation. Istanbul, Turkey, May 21-27, 2012. Paris: European Language Resources Associa-tion (ELRA), pp.3881-3885.

S. Kafka, I. Lewin, D. Milward, E. van Mulligen, J. Kors, U. Hahn & D. Rebholz-Schuhmann, CALBC: Releasing the Final Corpora, In: LREC 2012 - Proceedings of the 8th International Conference on Language Resources and Evaluation. Istanbul, Turkey, May 21-27, 2012. Paris: European Language Resources Associa-tion (ELRA), pp.2923-2926.

E. Buyko, E. Beisswanger & U. Hahn, Extraction of Pharmacogenetic and Pharmacogenomic Relations - A Case Study Using PharmGKB, In: R.B. Altman, A.K. Dunker, L. Hunter, T.A. Jung & T.E. Klein (Eds.), PSB 2012 - Proceed-ings of the Pacific Symposium on Biocomputing 2012. Big Island, Hawaii, USA, January 3-7, 2012. New Jersey etc: World Scientific, 2012, pp. 376-387.

E. Buyko, J. Linde, S. Priebe & U. Hahn, Towards Automatic Pathway Generation from Biological Full-Text Publications, In: J Gama, E. Bradley & J. Hollmen (Eds.), Advances in Intelligent Data Analysis X. IDA 2011 - Proceedings of the 10th International Conference on Intelligent Data Analysis: Analyzing and Understanding Complex Systems. Porto, Portugal, October 29-31, 2011. Berlin etc.: Springer, 2011, pp. 67-79 (Lecture Notes in Computer Science, 7014)

E. Buyko & U. Hahn, Generating Semantics for the Life Sciences via Text Analytics, In: ICSC 2011 - Proceedings of the 5th IEEE International Conference on Semantic Computing. Stanford University, CA, USA, September 18-21, 2011. IEEE Computer Society Press, 2011, pp. 193-196.

K. Tomanek, U. Hahn, S. Lohmann & J. Ziegler. A Cognitive Cost Model of Annotations Based on Eye-Tracking Data, In: ACL 2010 - Proceedings of the 48th Annual Meeting of the Association for Computational Linguistics. Uppsala, Sweden, July 11-16, 2010. Stroudsburg/PA: Association for Computational Linguistics, 2010.

E. Buyko & U. Hahn. Evaluating the Impact of Alternative Dependency Graph Encodings on Solving Event Extraction Tasks, In: EMNLP 2010 - Proceedings of the 2010 Conference on Empirical Methods in Natural Language Processing. M.I.T., Boston, MA, USA, October 9-11, 2010. Stroudsburg/PA: Association for Computational Liguistics, 2007, pp.982-992.

K. Tomanek & U. Hahn. Annotation Time Stamps: Temporal Metadata from the Linguistic Annotation Process, In: LREC 2010 - Proceedings of the 7th International Conference on Language Resources and Evaluation. La Valletta, May 17-23, 2010. Paris: European Language Resources Association (ELRA).

K. Tomanek & U. Hahn. A Comparison of Approaches to Cost-Sensitive Active Learning, In: COLING 2010 - Proceedings of the 23rd International Conference on Computational Linguistics. Beijing, Cjina, August 23-27, 2010. Paris: European Language Resources Association (ELRA).

E. Beisswanger, J. Wermter & U. Hahn. Aligning UniProt and MeSH: A Case Study on Human Protein Terms, In: MedInfo 2010 - Proceedings of the 13th World Congress on Medical and Health Informatics. Ed. by L. Hanmer & B. Faye. Cape Town, South Africa, September 12-15, 2010. Amsterdam etc.: IOS Press, 2010, (Studies in Health Technology and Informatics)

S. Lohmann, K. Tomanek, J. Ziegler & U. Hahn. Getting at the Cognitive Complexity of Linguistic Metadata Annotation - A Pilot Study Using Eyetracking, In: CogSci 2010 - Proceedings of the 32nd Annual Conference of the Cognitive Science Society. Portland., OR, USA, August 11-14, 2010. Cognitive Science Society [CD-ROM]

U. Hahn, K. Tomanek, E. Beisswanger & E. Faessler. A Proposal for a Configurable Silver Standard, In: LAW IV @ ACL 2010 - Proceedings of the 4th Linguistic Annotation Workshop. Uppsala, Sweden, July 15-16, 2010. Stroudsburg/PA: Association for Computational Linguistics, 2010.

E. Buyko, E. Beisswanger & U. Hahn. The GeneReg Corpus for Gene expression Regulation Events: An Overview of the Corpus and its In-Domain and Out-of-Domain Interoperability, In: LREC 2010 - Proceedings of the 7th International Conference on Language Resources and Evaluation. La Valletta, Malta, May 17-23, 2010. Paris: European Language Resources Association (ELRA).

E. Beisswanger & U. Hahn. JULIE Lab's UIMA Collection Reader for Wikipedia, In: New Challenges for NLP Frameworks Workshop @ LREC 2010. La Valletta, Malta, May 22, 2010. Paris: European Language Resources Association (ELRA).


A. Schneider, R. Landefeld, J. Wermter & U. Hahn, Do Users Appreciate Novel Interface Features for Literature Search? A User Study in the Life Sciences Domain, In: IEEE SMC 2009 - Proceedings of the 2009 IEEE International Conference on Systems, Man, and Cybernetics. Intelligent Human-Machine Systems for Quality of Life. San Antonio, TX, USA, October 11-14, 2009. Piscataway, NJ: Computer Society Press of the IEEE, 2009.

K. Tomanek & U. Hahn, Reducing Class Imbalance during Active Learning for Named Entity Annotation, In: K-CAP 2009 - Proceedings of the 5thInternational Conference on Knowledge Capture. Los Angeles, CA, USA, September 1-4, 2009. New York/NY: ACM Press, 2009.

K. Tomanek & U. Hahn, Semi-supervised Active Learning for Sequence Labeling, In: ACL-IJCNLP 2009 - Proceedings of the 47th Annual Meeting of the Association for Computational Linguistic and the 4thInternational Joint Conference on Natural Language Processing of the Asian Federation of Natural Language Processing, Singapore, August 2-7, 2009. East Stroudsburg/PA: Association for Computational Linguistics (ACL), 2009, pp.1039-1047.

K. Tomanek & U. Hahn, Timed Annotations: Enhancing MUC7 Metadata by the Time it Takes to Annotate Named Entities, In: LAW III @ ACL-IJCNLP 2009 - Proceedings of the 3rd Linguistic Annotation Workshop. Singapore, August 6-7, 2009. East Stroudsburg/PA: Association for Computational Linguistics (ACL), 2009, pp.112-115.

U. Hahn, K. Tomanek, E. Buyko, J.-j. Kim & D. Rebholz-Schuhmann, How Feasible and Robust is the Automatic Extraction of Gene Regulation Events? A Cross-Method Evaluation under Lab and Real-Life Conditions In: BioNLP @ NAACL-HLT 2009 - Proceedings of the Workshop on Biomedical Language Processing. Boulder, CO, USA, June 4, 2009. Stroudsburg/PA: Association for Computational Linguistics, 2009.

K. Tomanek, F. Laws, U. Hahn & H. Schütze, On Proper Unit Selection in Active Learning: Co-Selection Effects for Named Entity Recognition In: Proceedings of the NAACL HLT 2009 Workshop on Active Learning for Natural Language Processing.Boulder, CO, USA, June 5, 2009. Stroudsburg/PA: Association for Computational Linguistics, 2009.

E. Buyko & U. Hahn, Are Morpho-Syntactic Features More Predictive for the Resolution of Noun Phrase Coordination Ambiguity than Lexico-Semantic Similarity Scores ?, In: COLING 2008 - Proceedings of the 22nd International Conference on Computational Linguistics. Manchester, England, August 18-22, 2008, pp.89-96.

M. Poprat, E. Beisswanger & U. Hahn, Building a BioWordNet by Using WordNet's Data Formats and WordNet's Software Infrastructure - A Failure Report, In: SETQA_NLP 2008 - Proceedings of the ACL 2008 Workshop on Software Engineering, Testing, and Quality Assurance for Natural Language Processing. Columbus, OH, USA, June 19, 2008. Association for Computational Linguistics (ACL), 2008, pp.31-39.

R. Reichart, K. Tomanek, U. Hahn & A. Rappoport, Multi-Task Active Learning for Linguistic Annotations, In: ACL 2008 - Proceedings of the 46th Annual Meeting of the Association for Computational Linguistics: Human Language Technologies. Columbus, OH, USA, June 15-20, 2008. Association for Computational Linguistics (ACL), 2008, pp.861-869.

U. Hahn, E. Buyko, R. Landefeld, M. Mühlhausen, M. Poprat, K. Tomanek & J. Wermter, An Overview of JCoRe, the JULIE Lab UIMA Component Repository, In: Proceedings of the LREC 2008 Workshop 'Towards Enhanced Interoperability for Large HLT Systems - UIMA for NLP'. Marrakech, Morocco, 31 May 2008. European Language Resources Association (ELRA).

K. Tomanek & U. Hahn, Approximating Learning Curves for Active Learning Driven Annotation, In: LREC 2008 - Proceedings of the 6th International Conference on Language Resources and Evaluation. Marrakech, Morocco, 26-31 May 2008. European Language Resources Association (ELRA).

U. Hahn, E. Beisswanger, E. Buyko, M. Poprat & J. Wermter, Semantic Annotations for Biology: A Corpus Development Initiative at Jena University Language & Information Engineering (JULIE) Lab, In: LREC 2008 - Proceedings of the 6th International Conference on Language Resources and Evaluation. Marrakech, Morocco, 26-31 May 2008. European Language Resources Association (ELRA).

E. Beisswanger, V. Lee, J.-J. Kim, D. Rebholz-Schuhmann, A. Splendiani, O. Dameron, S. Schulz & U. Hahn, Gene Regulation Ontology (GRO): Design Principles and Use Cases., In: MIE 2008 - Proceedings of the 20th International Congress of the European Federation for Medical Informatics. Göteborg, Sweden, 26-28 May, 2008. IOS Press, 2008, pp.9-14 (Studies in Health Technology and Informatics).

E. Buyko & U. Hahn, Fully Embedded Type Systems for the Semantic Annotation Layer, In: ICGL 2008 - Proceedings of the 1st International Conference on Global Interoperability for Language Resources. Hong Kong, SAR, January 9-11, 2008, pp.26-33.

E. Beisswanger, David S. DeLuca, R. Blasczyk & U. Hahn, An Ontology for Major Histocompatibility Complex (MHC) Alleles and Molecules, In: AMIA 2007 - Proceedings of the 2007 Annual Symposium of the American Medical Informatics Association. Biomedical and Health Informatics: From Foundations to Applications to Policy. Chicago, IL, USA, November 10-14, 2007. Hanley & Belfus, 2007, pp.41-45.

E. Buyko, K. Tomanek & U. Hahn, Resolution of Coordination Ellipses in Biological Named Entities Using Conditional Random Fields, In: PACLING 2007 - Proceedings of the 10th Conference of the Pacific Association for Computational Linguistics. Melbourne, Australia, September 19-21, 2007. Pacific Association for Computational Linguistics, 2007, pp.163-171.

K. Tomanek, J. Wermter & U. Hahn, Sentence and Token Splitting Based on Conditional Random Fields, In: PACLING 2007 - Proceedings of the 10th Conference of the Pacific Association for Computational Linguistics. Melbourne, Australia, September 19-21, 2007. Pacific Association for Computational Linguistics, 2007, pp.49-57.

K. Tomanek, J. Wermter & U. Hahn, A Reappraisal of Sentence and Token Splitting for Life Sciences Documents, In: MedInfo 2007 - Proceedings of the 12th World Congress on Health (Medical) Informatics. Building Sustainable Health Systems. Brisbane, Australia, August 20-24, 2007. IOS Press, 2007, pp.524-528 (Studies in Health Technology and Informatics, 129)

K. Markó, P. Daumke, S. Schulz, R. Klar & U. Hahn, Large-Scale Evaluation of a Medical Cross-Language Information Retrieval System, In: MedInfo 2007 - Proceedings of the 12th World Congress on Health (Medical) Informatics. Building Sustainable Health Systems. Brisbane, Australia, August 20-24, 2007. IOS Press, 2007, pp.392-396 (Studies in Health Technology and Informatics, 129)

M. Poprat & U. Hahn, Quantitative Data on Referring Expressions in Biomedical Abstracts, In: BioNLP @ ACL 2007 - Proceedings of the Workshop on Biological, Translational, and Clinical Language Processing. Prague, Czech Republic, June 29, 2007. Association for Computational Linguistics (ACL), 2007, pp.193-194.

U. Hahn, E. Buyko, K. Tomanek, S. Piao, J. McNaught, Y. Tsuruoka & S. Ananiadou, An Annotation Type System for a Data-Driven NLP Pipeline, In: The LAW @ ACL 2007 - Proceedings of the Linguistic Annotation Workshop. Prague, Czech Republic, June 28-29, 2007. Association for Computational Liguistics (ACL), 2007, pp.33-40.

K. Tomanek, J. Wermter & U. Hahn, Efficient Annotation with the Jena ANnotation Environment (JANE), In: The LAW @ ACL 2007 - Proceedings of the Linguistic Annotation Workshop. Prague, Czech Republic, June 28-29, 2007. Association for Computational Liguistics (ACL), 2007, pp.9-16.

K. Tomanek, J. Wermter & U. Hahn, An Approach to Text Corpus Construction which Cuts Annotation Costs and Maintains Reusability of Annotated Data, In: EMNLP-CoNLL 2007 - Proceedings of the 2007 Joint Conference on Empirical Methods in Natural Language Processing and Computational Natural Language Learning. Prague, Czech Republic, June 28-30, 2007. Association for Computational Liguistics (ACL), 2007, pp.486-495.

S. Schulz, E. Beisswanger, J. Wermter & U. Hahn, Towards an Upper-Level Ontology for Molecular Biology, In: AMIA 2006 - Proceedings of the 2006 Annual Symposium of the American Medical Informatics Association. Biomedical and Health Informatics: From Foundations to Applications to Policy. Washington, D.C., USA, November 11-15, 2006. Hanley & Belfus, 2006, pp.694-698.

S. Schulz, E. Beisswanger, U. Hahn, J. Wermter, A. Kumar & H. Stenzhorn, From GENIA to BioTop : Towards a Top-Level Ontology for Biology, In: B. Bennett & C. Fellbaum (Eds.), Formal Ontology in Information Systems. Proceedings of the 4th International Conference - FOIS 2006. Baltimore, Maryland, USA, November 9-11, 2006. IOS Press, 2006, pp.103-114 (Frontiers in Artificial Intelligence and Applications, 150).

K. Markó, P. Daumke & U. Hahn, Cross-Lingual Alignment of Biomedical Acronyms and Their Expansions, In: MIE 2006 - Proceedings of the 20th International Congress of the European Federation for Medical Informatics. Ubiquity: Technologies for Better Health in Aging Societies. Maastricht, The Netherlands, 27-30 August 2006. IOS Press, 2006, pp.857-862 (Studies in Health Technology and Informatics, 124).

M. Poprat, K. Markó & U. Hahn, A Language Classifier that Automatically Divides Medical Documents for Experts and Health Care Consumers, In: MIE 2006 - Proceedings of the 20th International Congress of the European Federation for Medical Informatics. Ubiquity: Technologies for Better Health in Aging Societies. Maastricht, The Netherlands, 27-30 August 2006. IOS Press, 2006, pp.503-508 (Studies in Health Technology and Informatics, 124).

J. Wermter & U. Hahn, You Can't Beat Frequency (Unless You Use Linguistic Knowledge): A Qualitative Evaluation of Association Measures for Collocation and Term Extraction, In: COLING - ACL 2006. Proceedings of the Joint 21st International Conference on Computational Linguistics and 44th Annual Meeting of the Association for Computational Linguistics. Sydney, Australia, July 17-21, 2006. Association for Computational Linguistics (ACL), 2006, pp.785-792.

S. Schulz, K. Markó, P. Daumke, U. Hahn, S. Hanser, P. Nohama, R. Leite de Andrade, E. Pacheco & M. Romacker, Semantic Atomicity and Multilinguality in the Medical Domain: Design Considerations for the MorphoSaurus Subword Lexicon, In: LREC 2006 - Proceedings of the 5th International Conference on Language Resources and Evaluation. Genoa, Italy, 24-26 May 2006. European Language Resources Association (ELRA). CD-ROM, pp.1684-1687.

J. Wermter & U. Hahn, Effective Grading of Termhood in Biomedical Literature, In: AMIA 2005 Symposium - Proceedings of the Annual Symposium of the American Medical Informatics Association. Biomedical and Health Informatics: From Foundations to Applications to Policy. Washington, D.C., USA, October 22-26, 2005. Hanley & Belfus, 2005, pp.809-813.

S. Schulz, P. Daumke, B. Smith & U. Hahn, How to Distinguish Parthood from Location in Bioontologies, In: AMIA 2005 Symposium - Proceedings of the Annual Symposium of the American Medical Informatics Association. Biomedical and Health Informatics: From Foundations to Applications to Policy. Washington, D.C., USA, October 22-26, 2005. Hanley & Belfus, 2005, pp.669-673.

J. Wermter & U. Hahn, Massive Biomedical Term Discovery, In: A. Hoffmann, H. Motoda & T. Scheffer (Eds.), Discovery Science DS 2005 - Proceedings of the 8th International Conference on Discovery Science. Singapore, 8-11 October 2005. Springer, 2005, pp.281-293 (Lecture Notes in Artificial Intelligence, 3735).

U. Hahn, P. Daumke, S. Schulz & K. Markó, Cross-Language Mining for Acronyms and their Completions from the Web, In: A. Hoffmann, H. Motoda & T. Scheffer (Eds.), Discovery Science DS 2005 - Proceedings of the 8th International Conference on Discovery Science. Singapore, 8-11 October 2005. Springer, 2005, pp.113-123 (Lecture Notes in Artificial Intelligence, 3735).

J. Wermter & U. Hahn, Paradigmatic Modifiability Statistics for the Extraction of Complex Multi-Word Terms, In: HLT/EMNLP 2005 - Proceedings of the Human Language Technology Conference and the Conference on Empirical Methods in Natural Language Processing. Vancouver, B.C., Canada, 6-8 October 2005. Association for Computational Linguistics (ACL), 2005, pp.843-850.

J. Wermter & U. Hahn, Finding New Terminology in Very Large Corpora BEST PAPER AWARD!, In: K-CAP '05 - Proceedings of the 3rd International Conference on Knowledge Capture. Banff, Canada, October 2-5, 2005. ACM Press, 2005, pp.137-144.

U. Hahn, J. Wermter & J. Fluck, Noun Phrases and Named Entities in Biomedical Texts: Does Domain Change without Retraining Matter?, In: RANLP 2005 - Proceedings of the 5th International Conference on Recent Advances in Natural Language Processing. Borovets, Bulgaria, 21-23 September, 2005, pp.615-621.

M. Poprat & U. Hahn, Enough is enough! - Estimating Upper Bounds of the Size of Training Corpora for Unsupervised PP Attachment Disambiguation, In: RANLP 2005 - Proceedings of the 5th International Conference on Recent Advances in Natural Language Processing. Borovets, Bulgaria, 21-23 September, 2005, pp.405-411.

K.Markó, S. Schulz & U. Hahn, Multilingual Lexical Acquisition by Bootstrapping Cognate Seed Lexicons, In: RANLP 2005 - Proceedings of the 5th International Conference on Recent Advances in Natural Language Processing. Borovets, Bulgaria, 21-23 September, 2005, pp.301-307.

K. Markó, S. Schulz & U. Hahn, Automatic Lexicon Acquisition for a Medical Cross-Language Information Retrieval System, In: MIE 2005 - Connecting Medical Informatics and Bio-Informatics. Proceedings of the 19th International Congress of the European Federation for Medical Informatics. Geneva, Switzerland, 28 August - 1 September 2005. IOS Press, 2005, pp.829-834 (Studies in Health Technology and Informatics 116).

S. Schulz, U. Hahn, J. Rogers, Semantic Clarification of the Representation of Procedures and Diseases in SNOMED® CT, In: MIE 2005 - Connecting Medical Informatics and Bio-Informatics. Proceedings of the 19th International Congress of the European Federation for Medical Informatics. Geneva, Switzerland, 28 August - 1 September 2005. IOS Press, 2005, pp.773-778 (Studies in Health Technology and Informatics 116).

K. Markó, S. Schulz, A. Medelyan & U. Hahn, Boostrapping Dictionaries for Cross-Language Information Retrieval, In: SIGIR 2005 - Proceedings of the 28th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval. Salvador, Brazil, August 15-19, 2005. ACM Press, 2005, pp.528-535.

K. Markó, S. Schulz & U. Hahn, Unsupervised Multilingual Word Sense Disambiguation via an Interlingua, In: AAAI'05 - Proceedings of the 20th National Conference on Artificial Intelligence. Pittsburgh, PA, July 9-13, 2005. AAAI Press - MIT Press, 2005, pp.1075-1080.

S. Schulz & U. Hahn, Ontological Foundations of Biological Continuants, In: A. C. Varzi & L. Vieu (Eds.), Formal Ontology in Information Systems. Proceedings of the 3rd International Conference - FOIS 2004. Turin, Italy, November 4-6, 2004. IOS Press, 2004, pp.319-330 (Frontiers in Artificial Intelligence and Applications, 114).

J. Wermter & U. Hahn, Really, is Medical Sublanguage that Different? Experimental Counter-Evidence from Tagging Medical and Newspaper Corpora, In: MedInfo 2004 - Proceedings of the 11th World Congress on Medical Informatics. San Francisco, CA, USA, September 7-11, 2004. Vol. 1. IOS Press, 2004, pp.560-564 (Studies in Health Technology and Informatics, 107).

J. Wermter & U. Hahn, Collocation Extraction Based on Modifiability Statistics, In: COLING Geneva 2004 - Proceedings of the 20th International Conference on Computational Linguistics. Geneva, Switzerland, August 23-27, 2004. Association for Computational Linguistics, 2004, pp.980-986.

U. Hahn & J. Wermter, High-Performance Tagging on Medical Texts, In: COLING Geneva 2004 - Proceedings of the 20th International Conference on Computational Linguistics. Geneva, Switzerland, August 23-27, 2004. Association for Computational Linguistics, 2004, pp.973-979.

S. Schulz, K. Markó, E. Sbrissia, P. Nohama & U. Hahn, Cognate Mapping: A Heuristic Strategy for the Semi-Supervised Acquisition of a Spanish Lexicon from a Portuguese Seed Lexicon., In: COLING Geneva 2004 - Proceedings of the 20th International Conference on Computational Linguistics. Geneva, Switzerland, August 23-27, 2004. Association for Computational Linguistics, 2004, p.813-819.

S. Schulz & U. Hahn, Representing Natural Kinds by Spatial Inclusion and Containment, In: ECAI 2004 - Proceedings of the 16th European Conference on Artificial Intelligence. Valencia, Spain, August 22-27, 2004. IOS Press, 2004, pp.403-407 (Frontiers in Artificial Intelligence and Applications, 110).

U. Hahn & J. Wermter, Tagging Medical Documents with High Accuracy, In: C. Zhang, H. W. Guesgen & W. K. Yeap (Eds.), PRICAI 2004: Trends in Artificial Intelligence. Proceedings of the 8th Pacific Rim International Conference on Artificial Intelligence. Auckland, New Zealand, August 9-13, 2004. Springer, 2004, pp.852-861 (Lecture Notes in Artificial Intelligence, 3157).

U. Hahn, K. Markó & S. Schulz, Learning Indexing Patterns from One Language for the Benefit of Others, In: AAAI'04 - Proceedings of the 19th National Conference on Artificial Intelligence. San José, CA, July 25-29, 2004. AAAI Press - MIT Press, 2004, pp.406-411.

U. Hahn, S. Schulz & K. Markó, Mereological Semantics for Bio-Ontologies, In: AAAI'04 - Proceedings of the 19th National Conference on Artificial Intelligence. San José, CA, July 25-29, 2004. AAAI Press - MIT Press, 2004, pp.257-262.

S. Schulz & U. Hahn, Parthood as Spatial Inclusion: Evidence from Biomedical Conceptualizations, In: Principles of Knowledge Representation and Reasoning. Proceedings of the 9th International Conference - KR 2004. Whistler, B.C., Canada, June 2-5, 2004. Menlo Park/CA: AAAI Press, 2004, pp.55-63.

U. Hahn & J. Wermter, Pumping Documents through a Domain and Genre Classification Pipeline, In: LREC 2004 - Proceedings of the 4th International Conference on Language Resources and Evaluation - In Memory of Antonio Zampolli. Lisbon, Portugal, 26-28 May 2004. Vol.3. European Language Resources Association (ELRA), 2004, pp.735-738.

J. Wermter & U. Hahn, An Annotated German-Language Medical Text Corpus as Language Resource, In: LREC 2004 - Proceedings of the 4th International Conference on Language Resources and Evaluation - In Memory of Antonio Zampolli. Lisbon, Portugal, 26-28 May 2004. Vol.2. European Language Resources Association (ELRA), 2004, pp.473-476.

U. Hahn, K. Markó, M. Poprat, S. Schulz, J. Wermter & P. Nohama, Crossing Languages in Text Retrieval via an Interlingua, In: RIAO'2004 - Conference Proceedings of the 7th RIAO Conference. Coupling Approaches, Coupling Media and Coupling Languages for Information Retrieval. Avignon, France, April 26-28, 2004. Centre de Hautes Etudes Internationales d'Informatique Documentaire (C.I.D.), 2004, pp.100-115.

K. Markó, U. Hahn, S. Schulz, P. Daumke & P. Nohama, Interlingual Indexing across Different Languages, In: RIAO'2004 - Conference Proceedings of the 7th RIAO Conference. Coupling Approaches, Coupling Media and Coupling Languages for Information Retrieval. Avignon, France, April 26-28, 2004. Centre de Hautes Etudes Internationales d'Informatique Documentaire (C.I.D.), 2004, pp.82-99.

K. Markó, P. Daumke, S. Schulz & U. Hahn, Cross-Language MeSH Indexing Using Morpho-Semantic Normalization, In: AMIA 2003 Symposium - Proceedings of the Annual Symposium of the American Medical Informatics Association. Biomedical and Health Informatics: From Foundations to Applications. Washington, D.C., USA, November 8-12, 2003. Hanley & Belfus, 2003, pp. 425-429.

U. Hahn, M. Honeck & S. Schulz, Subword-Based Text Retrieval, In: HICSS-36 - Proceedings of the 36th Annual Hawaii International Conference on System Sciences. Waikoloa Village, Big Island, Hawaii, USA, January 6-9, 2003. IEEE Computer Society Press, 2003 [CD-ROM Version].

U. Hahn & S. Schulz, Towards a Broad-Coverage Biomedical Ontology Based on Description Logics, In: R.B. Altman, A.K. Dunker, L. Hunter, T.A. Jung & T.E. Klein (Eds.), Pacific Symposium on Biocomputing - PSB 2003. Kauai, Hawaii, USA, January 3-7, 2003. World Scientific, 2002, pp.577-588.

S. Schulz & U. Hahn, A Knowledge Representation View on Biomedical Structure and Function, In: AMIA 2002 Symposium - Proceedings of the Annual Symposium of the American Medical Informatics Association. Bio*medical Informatics: One Discipline. San Antonio, TX, USA, November 9-13, 2002. Hanley & Belfus, 2002, pp.687-691.

U. Hahn & S. Schulz, 240,000 Concepts and Relations - Towards Mega Knowledge Bases for Real-World Applications, In: IEEE SMC ´02 - Proceedings of the 2002 IEEE International Conference on Systems, Man, and Cybernetics. Hammamet, Tunesia, October 6-9, 2002. Computer Society Press of the IEEE, 2002 [CD-ROM Version].

U. Hahn & S. Schulz, Turning Lead into Gold? Feeding a Formal Knowledge Base with Informal Conceptual Knowledge, In: A. Gómez-Pérez & V.R. Benjamins (Eds.), Knowledge Engineering and Knowledge Management: Ontologies and the Semantic Web. Proceedings of the 13th International Conference - EKAW '02. Sigüenza, Spain, October 1-4, 2002. Springer, 2002, pp.182-196 (Lecture Notes in Artificial Intelligence, 2473).

M. Honeck, U. Hahn, R. Klar & S. Schulz, Text Retrieval Based on Medical Subwords, In: G. Surján, R. Engelbrecht & P. McNair (Eds.), Health Data in the Information Society. Proceedings of MIE 2002. Budapest, Hungary, August 2002. IOS Press, 2002, pp.241-245 (Studies in Health Technology and Informatics, 90).

S. Schulz, M. Honeck & U. Hahn, Biomedical Text Retrieval in Languages with a Complex Morphology, In: Proceedings of the ACL-02 Workshop on 'Natural Language Processing in the Biomedical Domain'. Philadelphia, PA, USA, July 11, 2002. Association for Computational Linguistics (ACL), 2002, pp.61-68.

U. Hahn & S. Schulz, Towards Very Large Ontologies for Medical Language Processing, In: LREC 2002 - Proceedings of the 3rd International Conference on Language Resources and Evaluation. Vol. 6. Las Plamas de Gran Canaria, Spain, 29-31 May, 2002. European Language Resources Association (ELRA), 2002, pp.2137-2144.

S. Schulz & U. Hahn, Necessary Parts and Wholes in Bio-Ontologies, In: Principles of Knowledge Representation and Reasoning. Proceedings of the 8th International Conference - KR 2002. Toulouse, France, April 22-25, 2002. Morgan Kaufmann, 2002, pp.387-394.

U. Hahn & S. Schulz, Massive Bio-Ontology Engineering for NLP, In: HLT 2002 - Proceedings of the 2nd International Conference on Human Language Technology Research. San Diego, CA, USA, March 24-27, 2002. Morgan Kaufmann, 2002, pp.68-75.

U. Hahn, M. Romacker & S. Schulz, Creating Knowledge Repositories from Biomedical Reports: The medSynDiKATe Text Mining System, In: R. B. Altman, A. K. Dunker, L. Hunter, K. Lauderdale & T. E. Klein (Eds.), Pacific Symposium on Biocomputing - PSB 2002. Kauai, Hawaii, USA, January 3-7, 2002. World Scientific Publishing, 2001, pp.338-349.

M. Romacker & U. Hahn, Empirical Data for the Semantic Interpretation of Prepositional Phrases in Medical Documents, In: AMIA 2001 - Proceedings of the Annual Symposium of the American Medical Informatics Association. A Medical Informatics Odyssey: Visions of the Future and Lessons from the Past. Washington, D.C., USA, November 3-7, 2001. Hanley & Belfus, 2001, pp.563-567 (2001 Symposium Supplement of the Journal of the American Medical Informatics Association).

U. Hahn, M. Honeck, M. Piotrowski & S. Schulz, Subword Segmentation: Leveling out Morphological Variations for Medical Document Retrieval, In: AMIA 2001 - Proceedings of the Annual Symposium of the American Medical Informatics Association. A Medical Informatics Odyssey: Visions of the Future and Lessons from the Past. Washington, D.C., USA, November 3-7, 2001. Hanley & Belfus, 2001, pp.229-233 (2001 Symposium Supplement of the Journal of the American Medical Informatics Association).

U. Hahn & K. Markó, Joint Knowledge Capture for Grammars and Ontologies, In: K-CAP 2001 - Proceedings of the 1st International Conference on Knowledge Capture. Victoria, B.C., Canada, October 21-23, 2001. ACM Press, 2001, pp.68-75.

S. Schulz & U. Hahn, Mereotopological Reasoning about Parts and (W)Holes in Bio-Ontologies, In: C. Welty & B. Smith (Eds.), Formal Ontology in Information Systems. Collected Papers from the 2nd International Conference - FOIS 2001. Ogunquit, Maine, USA, October 17-19, 2001. ACM Press, 2001, pp.210-221.

U. Hahn, M. Honeck & S. Schulz, A Search Engine for Morphologically Complex Languages, In: F. Hoffmann, D. J. Hand, N. Adams, D. Fisher & G. Guimaraes (Eds.), Advances in Intelligent Data Analysis. Proceedings of the 4th International Conference - IDA 2001. Cascais, Portugal, September 13-15, 2001. Springer, 2001, pp.73-83 (Lecture Notes in Computer Science, 2189)

H. Schauer & U. Hahn, Anaphoric Cues for Coherence Relations, In: Proceedings of the International Euroconference 'Recent Advances in Natural Language Processing' - RANLP 2001. Tzigov Chark, Bulgaria, 5-7 September 2001. Incoma, 2001, pp.228-234.

S. Schulz, M. Honeck & U. Hahn, Indexing Medical WWW Documents by Morphemes, In: MedInfo 2001 - Proceedings of the 10th World Congress on Medical Informatics. Part 1. London, U.K., 2-5 September 2001. IOS Press, pp.266-270 (Studies in Health Technology and Informatics, 84)

M. Romacker & U. Hahn, Context-Based Ambiguity Management for Natural Language Processing, In: V. Akman, P. Bouquet, R. Thomason & R. A. Young (Eds.), Modeling and Using Context. Proceedings of the 3rd International and Interdisciplinary Conference - CONTEXT 2001. Dundee, U.K., July 27-30, 2001. Springer, 2001, pp.184-197 (Lecture Notes in Artificial Intelligence, 2116)

S. Schulz & U. Hahn, Parts, Locations, and Holes: Formal Reasoning about Anatomical Structures, In: S. Quaglini, P. Barahona & S. Andreassen (Eds.), Artificial Intelligence in Medicine. Proceedings of the 8th Conference on Artificial Intelligence in Medicine in Europe - AIME 2001. Cascais, Portugal, July 1-4, 2001. Springer, 2001, pp.293-303 (Lecture Notes in Artificial Intelligence, 2101)

M. Romacker & U. Hahn, Semantic Interpretation of Medical Language: Quantitative Analysis and Qualitative Yield, In: S. Quaglini, P. Barahona & S. Andreassen (Eds.), Artificial Intelligence in Medicine. Proceedings of the 8th Conference on Artificial Intelligence in Medicine in Europe - AIME 2001. Cascais, Portugal, July 1-4, 2001. Springer, 2001, pp.258-267 (Lecture Notes in Artificial Intelligence, 2101)

U. Hahn & M. Romacker, The SynDiKATe Text Knowledge Base Generator, In: HLT 2001 - Proceedings of the 1st International Conference on Human Language Technology Research. San Diego, CA, USA, March 18-21, 2001. Morgan Kaufmann, 2001, pp.328-333.

S. Schulz, U. Hahn & M. Romacker, Modeling Anatomical Spatial Relations with Description Logics, In: AMIA 2000 - Proceedings of the Annual Symposium of the American Medical Informatics Association. Converging Information, Technology, and Health Care. Los Angeles, CA, USA, November 4-8, 2000. Hanley & Belfus, 2000, pp. 779-783 (2000 Symposium Supplement of the Journal of the American Medical Informatics Association).

U. Hahn, M. Romacker & S. Schulz, medSynDiKATe: Design Considerations for an Ontology-Based Medical Text Understanding System, In: AMIA 2000 - Proceedings of the Annual Symposium of the American Medical Informatics Association. Converging Information, Technology, and Health Care. Los Angeles, CA, USA, November 4-8, 2000. Hanley & Belfus, 2000, pp. 330-334 (2000 Symposium Supplement of the Journal of the American Medical Informatics Association).

P. Franz, A. Zaiss, S. Schulz, U. Hahn & R. Klar, Automated Coding of Diagnoses: Three Methods Compared, In: AMIA 2000 - Proceedings of the Annual Symposium of the American Medical Informatics Association. Converging Information, Technology, and Health Care. Los Angeles, CA, USA, November 4-8, 2000. Hanley & Belfus, 2000, pp. 250-254 (2000 Symposium Supplement of the Journal of the American Medical Informatics Association).

S. Schulz, M. Romacker & U. Hahn, Knowledge Engineering the UMLS, In: A. Hasman, B. Blobel, J. Dudeck, R. Engelbrecht, G. Gell & H.-J. Prokosch (Eds.), Medical Infobahn for Europe. Proceedings of MIE 2000 and GMDS 2000. Hannover, Germany, August 27 - September 1, 2000. IOS Press, 2000, pp.701-705 (Studies in Health Technology and Informatics, 77).

M. Romacker, U. Hahn, S. Schulz & R. Klar, Semantic Analysis of Medical Free Texts, In: A. Hasman, B. Blobel, J. Dudeck, R. Engelbrecht, G. Gell & H.-J. Prokosch (Eds.), Medical Infobahn for Europe. Proceedings of MIE 2000 and GMDS 2000. Hannover, Germany, August 27 - September 1, 2000. IOS Press, 2000, pp.438-442 (Studies in Health Technology and Informatics, 77).

H. Schauer & U. Hahn, Phrases as Carriers of Coherence Relations, In: Proceedings of the 22nd Annual Conference of the Cognitive Science Society. Philadelphia, PA, USA, August 13-15, 2000. L. Erlbaum, 2000, pp.429-434.

U. Hahn & M. Romacker, An Integrated Model of Semantic and Conceptual Interpretation from Dependency Structures, In: COLING 2000 - Proceedings of the 18th International Conference on Computational Linguistics. Saarbrücken, Germany, July 31 - August 4, 2000. Morgan Kaufmann, 2000, pp.271-277.

M. Romacker & U. Hahn, An Empirical Assessment of Semantic Interpretation, In: Proceedings of the 6th Applied Natural Language Processing Conference & the 1st Conference of the North American Chapter of the Association for Computational Linguistics - ANLP-NAACL 2000. Seattle, WA, USA, April 29 - May 4, 2000. Morgan Kaufmann, 2000, pp.327-334.

U. Hahn & M. Romacker, On 'Deep' Knowledge Extraction from Documents, In: RIAO'2000 - Conference Proceedings of the 6th RIAO Conference. Content-Based Multimedia Information Access. Vol. 2. Paris, France, April 12-14, 2000. Centre de Hautes Etudes Internationales d'Informatique Documentaire (C.I.D.) & Center of Advanced Study of Information Systems, Inc. (C.A.S.I.S.), 2000, pp.923-942.

S. Schulz & U. Hahn, Knowledge Engineering by Large-Scale Knowledge Reuse: Experience from the Medical Domain, In: Principles of Knowledge Representation and Reasoning. Proceedings of the 7th International Conference - KR 2000. Breckenridge, CO, USA, April 12-15, 2000. Morgan Kaufmann, 2000, pp.601-610.

M. Romacker, S. Schulz & U. Hahn, Streamlining Semantic Interpretation for Medical Narratives, In: AMIA'99 - Proceedings of the 1999 Annual Symposium of the American Medical Informatics Association. Transforming Health Care through Informatics: Cornerstones for a New Information Management Paradigm. Washington, D.C., USA, November 6-10, 1999. Hanley & Belfus, 1999, pp.925-929 (1999 Symposium Supplement of the Journal of the American Medical Informatics Association).

U. Hahn & M. Romacker, SynDiKATe - Generating Text Knowledge Bases from Natural Language Texts, In: IEEE SMC '99 - Proceedings of the 1999 IEEE International Conference on Systems, Man, and Cybernetics. Vol. 5. Tokyo, Japan, October 12-15, 1999. Computer Society Press of the IEEE, 1999, pp.V-918 - V-923.

U. Hahn & K. Markert, On the Formal Distinction between Literal and Figurative Language, In: P. Barahona & J. J. Alferes (Eds.), Progress in Artificial Intelligence. Proceedings of the 9th Portuguese Conference on Artificial Intelligence - EPIA '99. Evora, Portugal, September 21-24, 1999. Springer, 1999, pp.133-147 (Lecture Notes in Artificial Intelligence, 1695)

U. Hahn & M. Romacker, Text Understanding for Knowledge Base Generation in the SynDiKATe System, In: T. Bench-Capon, G. Soda & A. M. Tjoa (Eds.), Database and Expert Systems Applications. Proceedings of the 10th International Conference - DEXA '99. Florence, Italy, August 30 - September 3, 1999. Springer, 1999, pp.135-145 (Lecture Notes in Computer Science, 1677)

S. Schulz, M. Romacker, P. Franz, A. Zaiss, R. Klar & U. Hahn, Towards a Multilingual Morpheme Thesaurus for Medical Free-text Retrieval, In: P. Kokol, B. Zupan, J. Stare, M. Premik & R. Engelbrecht (Eds.), Medical Informatics Europe'99 - MIE '99. August 1999, Ljubljana, Slovenia. IOS Press, 1999, pp.891-894 (Studies in Health Technology and Informatics, 68).

K. Markert & U. Hahn, Grounding Figurative Language Use in Incompatible Ontological Categorizations, In: Proceedings of the 21st Annual Conference of the Cognitive Science Society. Vancouver, B.C., Canada, August 19-21, 1999. L. Erlbaum, 1999, pp.361-366.

U. Hahn & M. Romacker, Incrementality and Locality of Language Comprehension: The Pivotal Role of Semantic Interpretation Schemata, In: Proceedings of the 21st Annual Conference of the Cognitive Science Society. Vancouver, B.C., Canada, August 19-21, 1999. L. Erlbaum, 1999, pp.202-207.

S. Staab & U. Hahn, Scalable Temporal Reasoning, In: IJCAI '99 - Proceedings of the 16th International Joint Conference on Artificial Intelligence. Stockholm, Sweden, July 31 - August 6, 1999. Morgan Kaufmann, 1999, pp.1247-1252.

M. Romacker, K. Markert & U. Hahn, Lean Semantic Interpretation, In: IJCAI '99 - Proceedings of the 16th International Joint Conference on Artificial Intelligence. Stockholm, Sweden, July 31 - August 6, 1999. Morgan Kaufmann, 1999, pp.868-875.

U. Hahn, S. Schulz & M. Romacker, Partonomic Reasoning as Taxonomic Reasoning in Medicine, In: AAAI'99 - Proceedings of the 16th National Conference on Artificial Intelligence. Orlando, Florida, July 18-22, 1999. AAAI Press - MIT Press, 1999, pp.271-276.

M. Romacker, S. Schulz & U. Hahn, Small is Beautiful: Compact Semantics for Medical Language Processing, In: W. Horn, Y. Shahar, G. Lindberg, S. Andreassen & J. Wyatt (Eds.), Artificial Intelligence in Medicine. Proceedings of the Joint European Conference on Artificial Intelligence in Medicine and Medical Decision Making - AIMDM '99. Aalborg, Denmark, June 20-24, 1999. Springer, 1999, pp.400-410 (Lecture Notes in Artificial Intelligence, 1620)

S. Schulz, M. Romacker & U. Hahn, Part-Whole Reasoning in Medical Ontologies Revisited: Introducing SEP Triplets into Classification-Based Description Logics, In: AMIA '98 - Proceedings of the 1998 AMIA Annual Fall Symposium. A Paradigm Shift in Health Care Information Systems: Clinical Infrastructures for the 21st Century. Orlando, FL, USA, November 7-11, 1998. Hanley & Belfus, 1998, pp.830-834 (1998 Supplement of the Journal of the American Medical Informatics Association).

U. Hahn & U. Reimer, Text Summarization Based on Terminological Logics, In: ECAI '98 - Proceedings of the 13th European Conference on Artificial Intelligence. Brighton, U.K., August 23-28, 1998. JohnWiley, 1998, pp.165-169

K. Schnattinger & U. Hahn, Quality-Based Learning, In: ECAI '98 - Proceedings of the 13th European Conference on Artificial Intelligence. Brighton, U.K., August 23-28, 1998. John Wiley, 1998, pp.160-164

U. Hahn, M. Romacker & S. Schulz, Why Discourse Structures in Medical Reports Matter for the Validity of Automatically Generated Text Knowledge Bases, In: MedInfo '98 - Proceedings of the 9th World Congress on Medical Informatics. Vol. 1. Seoul, Korea, August 1998. IOS Press, 1998, pp.633-638.

U. Hahn & K. Schnattinger, A Text Understander that Learns, In: COLING-ACL '98 - Proceedings of the 36th Annual Meeting of the Association for Computational Linguistics & 17th International Conference on Computational Linguistics. Montreal, Quebec, Canada, August 10-14, 1998. 1998, Vol. 1, pp.476-482.

S. Staab & U. Hahn, Grading on the Fly, In: Proceedings of the 20th Annual Conference of the Cognitive Science Society. University of Wisconsin-Madison, USA, August 1-4, 1998. L. Erlbaum, 1998, pp.1019-1024.

U. Hahn & K. Schnattinger, Towards Text Knowledge Engineering, In: AAAI'98 - Proceedings of the 15th National Conference on Artificial Intelligence. Madison, Wisconsin, USA, July 26-30, 1998. AAAI Press - MIT Press, 1998, pp.524-531.

U. Hahn & K. Schnattinger, Knowledge Mining from Textual Sources, In: Proceedings of the 6th International Conference on Information and Knowledge Management - CIKM '97. Las Vegas, Nevada, USA, November 10-14, 1997. Association for Computing Machinery (ACM), 1997, pp.83-90.

U. Hahn & M. Romacker, Text Structures in Medical Text Processing: Empirical Evidence and a Text Understanding Prototype, In: AMIA ´97 - Proceedings of the 1997 AMIA Annual Fall Symposium (formerly SCAMC). The Emergence of 'Internetable' Health Care. Systems That Really Work. Nashville, TN, USA, October 25-29, 1997. Hanley & Belfus, 1997, pp.819-823 (1997 Symposium Supplement of the Journal of the American Medical Informatics Association).

U. Hahn & K. Schnattinger, An Empirical Evaluation of a System for Text Knowledge Acquisition, In: E. Plaza & R. Benjamins (Eds.), Knowledge Acquisition, Modeling and Management. Proceedings of the 10th European Workshop - EKAW '97. Sant Feliu de Guíxols, Catalonia, Spain, October 15-18, 1997. Springer, 1997, pp.129-144 (Lecture Notes in Artificial Intelligence, 1319).

S. Schacht & U. Hahn, Temporal Reasoning about Actor Programs, In: E. Costa & A. Cardoso (Eds.), Progress in Artificial Intelligence. Proceedings of the 8th Portuguese Conference on Artificial Intelligence - EPIA '97. Coimbra, Portugal, October 6-9, 1997. Springer, 1997, pp.279-290 (Lecture Notes in Artificial Intelligence, 1323).

U. Hahn & M. Klenner, Incremental Concept Evolution Based on Adaptive Feature Weighting, In: E. Costa & A. Cardoso (Eds.), Progress in Artificial Intelligence. Proceedings of the 8th Portuguese Conference on Artificial Intelligence - EPIA '97. Coimbra, Portugal, October 6-9, 1997. Springer, 1997, pp.49-60 (Lecture Notes in Artificial Intelligence, 1323).

U. Hahn, P. Neuhaus & N. Bröker, Message-Passing Protocols for Real-World Parsing: An Object-Oriented Model and Its Preliminary Evaluation, In: Proceedings of the 5th International Workshop on Parsing Technologies - IWPT'97. Massachusetts Institute of Technology (M.I.T.), Boston, MA, USA 17-20 September 1997. Association for Computational Linguistics, SIGPARSE, 1997, pp.101-112.

U. Hahn & K. Schnattinger, Text Knowledge Engineering by Qualitative Terminological Learning, In: A. Hameurlain & A.M. Tjoa (Eds.), Database and Expert Systems Applications. Proceedings of the 8th International Conference - DEXA '97. Toulouse, France, September 1-5, 1997. Springer, 1997, pp.623-632 (Lecture Notes in Computer Science, 1308).

K. Markert & U. Hahn, On the Interaction of Metonymies and Anaphora, In: IJCAI'97 - Proceedings of the 15th International Joint Conference on Artificial Intelligence. Nagoya, Japan, August 23-29, 1997. Morgan Kaufmann, 1997, pp.1010-1015.

S. Staab & U. Hahn, "Tall", "Good", "High" - Compared to What?, In: IJCAI'97 - Proceedings of the 15th International Joint Conference on Artificial Intelligence. Nagoya, Japan, August 23-29, 1997. Morgan Kaufmann, 1997, pp.996-1001.

U. Hahn & K. Schnattinger, Deep Knowledge Discovery from Natural Language Texts, In: KDD'97 - Proceedings of the 3rd International Conference on Knowledge Discovery and Data Mining. Newport Beach, California, August 14-17, 1997. AAAI Press, 1997, pp.175-178.

M. Strube & U. Hahn, Centered Segmentation: Scaling up the Centering Model to Global Referential Discourse Structure, In: Proceedings of the 19th Annual Conference of the Cognitive Science Society. Stanford University, CA, USA, August 7-10, 1997. L. Erlbaum, 1997, pp.721-726.

U. Hahn & K. Markert , In Support of the Equal Rights Movement for Literal and Figurative Language: A Parallel Search and Preferential Choice Model, In: Proceedings of the 19th Annual Conference of the Cognitive Science Society. Stanford University, CA, USA, August 7-10, 1997. L. Erlbaum, 1997, pp.289-294.

K. Schnattinger & U. Hahn , Intelligent Text Analysis for Dynamically Maintaining and Updating Domain Knowledge Bases, In: X. Liu, P. Cohen & M. Berthold (Eds.), Advances in Intelligent Data Analysis: Reasoning about Data. Proceedings of the 2nd International Symposium - IDA '97. London, UK, August 4-6, 1997. Springer, 1997, pp.409-422 (Lecture Notes in Computer Science, 1280)

S. Staab & U. Hahn, Comparatives in Context, In: AAAI'97 - Proceedings of the 14th National Conference on Artificial Intelligence. Providence, Rhode Island, July 27-31, 1997. AAAI Press - MIT Press, 1997, pp.616-621.

U. Hahn & M. Strube, Centering in-the-Large: Computing Referential Discourse Segments, In: Proceedings of the 35th Annual Meeting of the Association for Computational Linguistics and the 8th Conference of the European Chapter of the Association for Computational Linguistics. Madrid, Spain, July 7-12, 1997. Morgan Kaufmann, 1997, pp. 104-111.

U. Hahn & K. Schnattinger, A Qualitative Growth Model for Real-World Text Knowledge Bases, In: RIAO'97 - Conference Proceedings with Prototype and Operational Systems Demonstrations: Computer-Assisted Information Searching on Internet. Montreal, Quebec, Canada, 25-27 June 1997. Centre de Hautes Etudes Internationales d'Informatique Documentaire (C.I.D.) & Center for the Advanced Study of Information Systems, Inc. (C.A.S.I.S.), 1997, pp.578-597.

S. Staab & U. Hahn, A Semantic Copying Model for Understanding Comparatives, In: Proceedings of the 2nd International Workshop on Computational Semantics - IWCS II. Tilburg, The Netherlands, 8-10 January 1997. Tilburg University, Department of Computational Linguistics, 1997, pp.274-286.

U. Hahn, K. Schnattinger & M. Romacker, Automatic Knowledge Acquisition from Medical Texts, In: AMIA ´96 - Proceedings of the 1996 AMIA Annual Fall Symposium (formerly SCAMC). Beyond the Superhighway: Exploiting the Internet with Medical Informatics. Washington, D.C., October 26-30, 1996. Hanley & Belfus, 1996, pp.383-387 (1996 Symposium Supplement of the Journal of the American Medical Informatics Association).

U. Hahn, K. Markert & M. Strube, A Conceptual Reasoning Approach to Textual Ellipsis, In: ECAI '96 - Proceedings of the 12th European Conference on Artificial Intelligence. Budapest, Hungary, August 11-16, 1996. John Wiley, 1996, pp. 572-576.

U. Hahn, M. Strube & K. Markert, Bridging Textual Ellipses, In: COLING '96 - Proceedings of the 16th International Conference on Computational Linguistics. Copenhagen, Denmark, August 5-9, 1996, Vol.1, pp.496-501.

P. Neuhaus & U. Hahn, Restricted Parallelism in Object-Oriented Lexical Parsing, In: COLING '96 - Proceedings of the 16th International Conference on Computational Linguistics. Copenhagen, Denmark, August 5-9, 1996, Vol.1, pp.502-507.

K. Markert, M. Strube & U. Hahn, Inferential Realization Constraints on Functional Anaphora in the Centering Model, In: CogSci '96 - Proceedings of the 18th Annual Conference of the Cognitive Science Society. University of California at San Diego, La Jolla, CA, USA, July 12-15, 1996. L. Erlbaum, 1996, pp.609-614.

U. Hahn & M. Strube, Incremental Centering and Center Ambiguity, In: CogSci '96 - Proceedings of the 18th Annual Conference of the Cognitive Science Society. University of California at San Diego, La Jolla, CA, USA, July 12-15, 1996. L. Erlbaum, 1996, pp.568-573.

M. Strube & U. Hahn, Functional Centering, In: Proceedings of the 34th Annual Meeting of the Association for Computational Linguistics - ACL '96. University of California at Santa Cruz, CA, USA, 24-27 June 1996. Morgan Kaufmann, 1996, pp.270-277.

U. Hahn, M. Klenner & K. Schnattinger, A Quality-Based Terminological Reasoning Model for Text Knowledge Acquisition, In: N. Shadbolt, K. O'Hara & G. Schreiber (Eds.), Advances in Knowledge Acquisition. Proceedings of the 9th European Knowledge Acquisition Workshop - EKAW '96. Nottingham, U.K., May 14-17, 1996. Springer, 1996, pp.131-146 (Lecture Notes in Artificial Intelligence, 1076).

M. Strube & U. Hahn, ParseTalk about Sentence- and Text-Level Anaphora, In: Proceedings of the 7th Conference of the European Chapter of the Association for Computational Linguistics - EACL ´95. Dublin, Ireland, March 27-31, 1995. Morgan Kaufmann, 1995, pp.237-244.

U. Hahn & M. Klenner, Tracking the Evolution of Concepts in Dynamic Worlds, In: D. Karagiannis (Ed.), Database and Expert Systems Applications. Proceedings of the 5th International Conference - DEXA '94. Athens, Greece, September 7-9, 1994. Springer, 1994, pp.410-419 (Lecture Notes in Computer Science, 856).

M. Klenner & U. Hahn, Concept Versioning: A Methodology for Tracking Evolutionary Concept Drift in Dynamic Concept Systems, In: ECAI '94 - Proceedings of the 11th European Conference on Artificial Intelligence. Amsterdam, The Netherlands, August 8-12 1994. John Wiley, 1994, pp.473-477.

S. Schacht, U. Hahn & N. Bröker, Concurrent Lexicalized Dependency Parsing: A Behavioral View on ParseTalk Events, In: COLING '94 - Proceedings of the 15th International Conference on Computational Linguistics. Kyoto, Japan, August 5-9, 1994, Vol.1, pp.489-493.

N. Bröker, U. Hahn & S. Schacht, Concurrent Lexicalized Dependency Parsing: The ParseTalk Model, In: COLING '94 - Proceedings of the 15th International Conference on Computational Linguistics. Kyoto, Japan, August 5-9, 1994, Vol.1, pp.379-385.

U. Hahn, On Text Coherence Parsing, In: COLING '92 - Proceedings of the 15th International Conference on Computational Linguistics. Vol.1: Topical Papers. Nantes, France, 23-28 August 1992. International Committee on Computational Linguistics (ICCL), 1992, pp.25-31.

U. Hahn, M. Jarke & Th. Rose, Group Work in Software Projects: Integrated Conceptual Models and Collaboration Tools, In: S. Gibbs & A.A. Verrijn-Stuart (Eds.), Multi-User Interfaces and Applications. Proceedings of the IFIP WG8.4 Conference on Multi-User Interfaces and Applications. Heraklion, Crete, Greece, 24-26 September, 1990. North-Holland, 1990, pp.83-101.

U. Hahn, R. Hammwöhner, U. Reimer & U. Thiel, Inhaltsorientierte Navigation in automatisch generierten Hypertext-Basen [Content-guided navigation in automatically generated hypertext bases], In: P.A. Gloor & N.A. Streitz (Eds.), Hypertext und Hypermedia - Von theoretischen Konzepten zur praktischen Anwendung. Springer, 1990, pp.205-219 (Informatik-Fachberichte, 249).

S. Eherer, M. Jarke & U. Hahn, Eine Software-Umgebung für die Erstellung von Hypermedia-Dokumenten durch Autorengruppen [A software environment for the production of hypermedia documents in author groups], In: P.A. Gloor & N.A. Streitz (Eds.), Hypertext und Hypermedia - Von theoretischen Konzepten zur praktischen Anwendung. Springer, 1990, pp.79-96 (Informatik-Fachberichte, 249).

U. Hahn, Dialogstrukturen in Gruppendiskussionen: ein Modell für argumentative Verhandlungen mehrerer Agenten [Dialogue structures in group discussions: a model for argumentation-based negotiations of multiple agents], In: D. Metzing (Ed.), GWAI '89 - Proceedings 13th German Workshop on Artificial Intelligence. Eringerfeld, 18.-22. September 1989. Springer, 1989, pp.409-420 (Informatik-Fachberichte, 216 - Subreihe Künstliche Intelligenz).

U. Hahn & M. Jarke, CoNeX: Coordination and Negotiation Support for Expert Teams in Project Management, In: EC-CSCW '89 - Proceedings of the 1st European Conference on Computer Supported Co-Operative Work. Gatwick, U.K., September 13-15, 1989, pp.402-405.

U. Hahn, M. Jarke, K. Kreplin, M. Farusi & F. Pimpinelli, CoAUTHOR: A Hypermedia Group Authoring Environment, In: EC-CSCW '89 - Proceedings of the 1st European Conference on Computer Supported Co-Operative Work. Gatwick, U.K., September 13-15, 1989, pp.226-244.

U. Hahn & U. Reimer, Automatic Generation of Hypertext Knowledge Bases, In: Proceedings of the Conference on Office Information Systems - COIS '88. Palo Alto, CA, USA, March 23-25, 1988. Association for Computing Machinery (ACM), 1988, pp.182-188.

U. Reimer & U. Hahn, Text Condensation as Knowledge Base Abstraction, In: Proceedings of the 4th IEEE/AAAI Conference on Artificial Intelligence Applications - CAIA '88. San Diego, CA, USA, March 14-18, 1988. Computer Society Press of the IEEE, 1988, pp.338-344.

U. Hahn & U. Reimer, TOPIC Essentials, In: COLING '86 - Proceedings of the 11th International Conference on Computational Linguistics. Bonn, 25-29 August 1986, University of Bonn. Institut für angewandte Kommunikations- und Sprachforschung [IKS], 1986, pp.497-503.

U. Hahn, A Generalized Word Expert Model of Lexically Distributed Text Parsing, In: B. du Boulay, D. Hogg & L. Steels (Eds.), Advances in Artificial Intelligence - II. 7th European Conference on Artificial Intelligence - ECAI '86. Brighton, U.K., July 20-25, 1986. North-Holland, 1987, pp.417-425.

U. Hahn, Textual Expertise in Word Experts: An Approach to Text Parsing Based on Topic/Comment Monitoring, In: COLING '84 - Proceedings of the 10th International Conference on Computational Linguistics & 22nd Annual Meeting of the Association for Computational Linguistics. Stanford University, CA, USA, 2-6 July 1984, pp. 402-408.

U. Hahn & U. Reimer, Computing Text Constituency: An Algorithmic Approach to the Generation of Text Graphs, In: C.J. van Rijsbergen (Ed.), Research and Development in Information Retrieval. Proceedings of the 3rd Joint BCS and ACM Symposium - SIGIR '84. King's College, Cambridge, England, 2-6 July 1984. Cambridge University Press, 1984, pp.343-368.

U. Reimer & U. Hahn, A Formal Approach to the Semantics of a Frame Data Model, In: IJCAI '83 - Proceedings of the 8th International Joint Conference on Artificial Intelligence. Karlsruhe, West Germany, 8-12 August 1983. W. Kaufmann, 1983, pp.337-339.