author- Gabler, Wiesbaden, (2010)
- CoRR (1998)
- CoRR (2007)
- CoRR (2008)
- IEEE Intelligent Systems 16(1):26-34 (2001)
- Foundations for the Web of Information and Services, page 327-341. Springer, (2011)
- IEEE Intelligent Systems 16(1):16-31 (2001)
- DAGM-Symposium, volume 3175 of Lecture Notes in Computer Science, page 455-462. Springer, (2004)
- International Semantic Web Conference, volume 2870 of Lecture Notes in Computer Science, page 897-912. Springer, (2003)
- CIA, volume 1652 of Lecture Notes in Computer Science, page 113-124. Springer, (1999)
- IEEE Intelligent Systems (January 2001)
- GI Jahrestagung 1, volume 67 of LNI, page 48-52. GI, (2005)
- (June 2000)
- IEEE Intelligent Systems 16(1):26 - 34 (2001)
- FHNW, Basel, (2009)
- ZEIT Wissen (1):38-43 (2011)= Lernen, Teil 2 .
- FHNW, Basel, (2009)
- FHNW, Basel, (2009)
- FHNW, Basel, (2009)
- FHNW, Basel, (2009)
