- Informatik-Spektrum 34(5):443-454 (October 2011)
- Lecture Notes in Computer Science Springer, Berlin, (2010)
- Communications of the ACM (July 2011)
- Automated Software Engineering 18(2):163-197 (June 2011)
- Informatik-Spektrum 34(4):400-404 (August 2011)
- Automated Software Engineering 18(2):199-224 (June 2011)
- Personal and Ubiquitous Computing 15(4):329-339 (April 2011)
- Informatik-Spektrum 34(4):377-390 (August 2011)
- Semantic Web 1(1-2):17-24 (2010)
- Lecture Notes in Artificial Intelligence Springer, Berlin, (2009)
- Reasoning Web: Semantic Technologies for Software Engineering, (2010)
- dpunkt, Heidelberg, (2004)
- Addison-Wesley, Boston, MA, (2000)
- World Wide Web 13(3):307-341 (2010)
- NICI Technical Report Nijmegen Institute for Cognition Research and Information Technology, Nijmegen, (1990)
- Spektrum, Heidelberg, (2007)
- MIT Press, Cambridge, MA, (1989)
- Springer, Berlin, (2007)
- ICTAI '05: Proceedings of the 17th IEEE International Conference on Tools with Artificial Intelligence, Hong Kong, China, page 254-259. (2005)
- Wiley, Chichester, UK, (2006)


user