author- ITC, page 316-321. IEEE Computer Society, (1989)
- ITC, page 431-438. IEEE Computer Society, (1989)
- ITC, page 548-555. IEEE Computer Society, (1991)
- White Paper, Institute for Applied Informatics and Formal Description Methods AIFB, Universität Karlsruhe TH, 76128 Karlsruhe, Germany, (2003)
- Handbook on Ontologies, Springer Berlin Heidelberg, 10.1007/978-3-540-92673-3_0 . (2009)
- Future Generation Comp. Syst. 28(3):554-562 (2012)
- J Immunol 187(4):1684-1691 (2011)
- EUROMICRO-SEAA, page 127-130. IEEE, (2010)
- CLAWAR, page 97-104. Springer, (2005)
- CLOSER, page 397-403. SciTePress, (2011)
- Proceedings of the Third International Conference on E-Commerce and Web Technologies EC-Web 2002, volume 2455 of Lecture Notes in Computer Science, page 304-313. Springer, (2002)
- Foundations for the Web of Information and Services, page 239-251. Springer, (2011)
- Applied Ontology 1(2):163-202 (2006)
- Handbook on Ontologies, Springer Berlin Heidelberg, 10.1007/978-3-540-92673-3_0 . (2009)
- Euro-Par 1, volume 6852 of Lecture Notes in Computer Science, page 405-406. Springer, (2011)
- Middleware, volume 3231 of Lecture Notes in Computer Science, page 459-477. Springer, (2004)
- Middleware 2004, volume 3231 of Lecture Notes in Computer Science, Springer Berlin / Heidelberg, 10.1007/978-3-540-30229-2_24 . (2004)
- Semantic Web and Beyond Springer, New York, (2006)
- Proceedings of the 12th Portuguese Conference on Artificial Intelligence - Progress in Artificial Intelligence EPIA 2005, page 218--231. (2005)
- OTM Workshops, volume 2889 of Lecture Notes in Computer Science, page 28-29. Springer, (2003)
