user- Informatik-Spektrum 34(5):462-468 (October 2011)
- Semantic Web 1(1-2):69-74 (2010)
- Studies in Linguistics and Philosophy Springer, Dordrecht, (2007)
- Informatik-Fachberichte Springer, Berlin, (1988)
- Springer, Berlin, (2009)
- NICI Technical Report Nijmegen Institute for Cognition Research and Information Technology, Nijmegen, (1990)
- Little, Brown and Co., Boston, (1991)
- Oxford University Press, New York, (1998)
- Machine Learning for Multimodal Interaction: 4th International Workshop, MLMI 2007, Brno, Czech Republic, (2007)
- CSLI Lecture Notes Center for the Study of Language and Information, Stanford, CA, (1985)
- MIT Press, Cambridge, MA, (1989)
- Springer, Heidelberg, (2008)
- MIT Press, Cambridge, MA, (1994)
- University of Chicago Press, Chicago, (1987)
- University of Chicago Press, Chicago, (1980)
- Lecture Notes in Computer Science Springer, Berlin, (2003)
- Lecture Notes in Computer Science Springer, Berlin, (2000)
- Lecture Notes in Artificial Intelligence Springer, Berlin, (2005)
- Lecture Notes in Artificial Intelligence Springer, Berlin, (2008)
- Lecture Notes in Computer Science Springer, Berlin, (1998)
