- ASE, page 295-298. (1999)
- PPSWR, volume 2901 of Lecture Notes in Computer Science, page 174-188. Springer, (2003)
- LOPSTR, volume 1559 of Lecture Notes in Computer Science, page 1-20. Springer, (1998)
- EC-TEL, volume 6383 of Lecture Notes in Computer Science, page 632-637. Springer, (2010)
- (February 1999)Handout of the Doktorandenseminar presentation at IFI, University of Zurich .
- Principles and Practices of Semantic Web Reasoning, volume 05371 of Dagstuhl Seminar Proceedings, Internationales Begegnungs- und Forschungszentrum für Informatik IBFI, Schloss Dagstuhl, Germany, (2005)
- Proceedings of the 3rd International Workshop on Controlled Language Applications, Seattle, Washington, (2000)
- EWIMT, QMUL, (2004)
- KI 11(4):60-64 (1997)
- ASE, page 295-298. (1999)
- WLP, page 0-. (1997)


author