- Applied Artificial Intelligence 24(1):1-26 (2010)
- Expert Systems 25(3):1-19 (2008)
- Int’l Journal on Semantic Web & Information Systems (2007)
- Proc. ACL2001, Workshop on Open Domanin QA, Toulouse, (2001)
- Universiteit Twente, (1996)
- Proc. ECDL 2000 Workshop on the Semantic Web, Lisbon, Portugal, (2000)
- Stanford University, (2001)
- HYPERTEXT '06: Proceedings of the seventeenth conference on Hypertext and hypermedia, page 31--40. New York, NY, USA, ACM Press, (2006)
- OntoText Lab, (2001)


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