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- Amsterdam, (2011)
- Tilburg University, Tilburg, The Netherlands, (December 2009)
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- Proceedings of the 15th International Conference on Conceptual Structures ICCS 2007, volume 4604 of Lecture Notes in Artificial Intelligence, page 283--295. Berlin, Heidelberg, Springer-Verlag, (July 2007)
- 30th European Conference on IR Research, ECIR 2008, volume 4956 of Lecture Notes in Computer Science, page 101-113. Glasgow, UK, Springer, (April 2008)
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- Proceedings of the First Conceptual Structures Tool Interoperability Workshop at the 14th International Conference on Conceptual Structures, page 87-102. Aalborg, Aalborg Universitetsforlag, (2006)
- HMD -- Praxis der Wirtschaftsinformatik (February 2010)
- MultiMedia und Recht (2010)
- AI Communications 21(4):231-247 (2008)
- Advances in Information Retrieval, 30th European Conference on IR Research, ECIR 2008, 4956, page 101-113. Springer, (2008)
- JCDL '07: Proceedings of the 7th ACM/IEEE-CS joint conference on Digital libraries, page 107--116. New York, NY, USA, ACM, (2007)
- WWW '07: Proceedings of the 16th international conference on World Wide Web, New York, NY, USA, ACM Press, (2007)
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