- IEEE Intelligent Systems 24(6):83-89 (2009)
- Springer, New York, (2011)
- Addison-Wesley, Boston, MA, (2002)
- Informatik-Spektrum 34(2):165-177 (April 2011)
- Informatik-Spektrum 34(4):364-376 (August 2011)
- IEEE Intelligent Systems 25(4):62-71 (2010)
- Communications of the ACM 54(1):36–38 (January 2011)
- Communications of the ACM 53(12):34–36 (December 2010)
- IEEE Internet Computing 14(6):39-46 (2010)
- O'Reilly, Beijing, (2007)
- Proceedings of the First International Workshop on Design and Integration Principles for Smart Objects DIPSO 2007, Innsbruck, Austria, (2007)
- SS-09-05, Menlo Park, CA, AAAI Press, (2009)
- Lecture Notes in Computer Science Springer, Berlin, (2009)
- The Adaptive Web: Methods and Strategies of Web Personalization, chapter 9, (2007)
- Proceedings of the Poster and Demonstration Session at the 7th International Semantic Web Conference ISWC 2008, Karlsruhe, Germany, (2008)
- Springer, Berlin, (2009)
- KI -- Künstliche Intelligenz 2005(3):23-28 (2005)
- O'Reilly, Beijing, (2010)
- MIT Press, Cambridge, MA, (2000)
- Springer, London, (2010)


user