- AAAI, The Future of Recommender Systems: Research and Applications edition, (to appear 2011)
- ÖGAI-Journal 24(4):1-7 (2005)
- Proceedings of the 14th International Joint Conference on Artificial Intelligence, page 2071--2072. San Francisco, CA, USA, Morgan Kaufmann Publishers Inc., (1995)
- Journal of Verbal Learning and Verbal Behavior 11(5):649 - 653 (1972)
- Journal of Experimental Psychology: Human Learning and Memory 6(4):355–369 (1980)
- Annals of Mathematics and Artificial Intelligence (June 2006)
- chapter Answer Sets, Elsevier Science, (2007)
- In Proceedings of ACM SIGIR Workshop on Recommender Systems, (1999)
- Proceedings of the 2009 IEEE Conference on Commerce and Enterprise Computing, page 49--56. Washington, DC, USA, IEEE Computer Society, (2009)
- IEEE Expert: Intelligent Systems and Their Applications (July 1997)
- Artificial Intelligence Review (2002)
- (2003)
- Communications of the ACM (March 1997)
- Proceedings of the 1st ACM conference on Electronic Commerce, page 158--166. New York, NY, USA, ACM, (1999)
- Artificial Intelligence Review 19(4):285-330 (2003)
- Springer, New York; London, (2011)
- Multikonferenz Wirtschaftsinformatik 2010, page 2251-2263. (2010)
- Proceedings of the 23rd International Conference on Industrial Engineering and other Applications of Applied Intelligent Systems, Springer, Berlin / Heidelberg, (2010)
- Proceedings of the 23rd International Conference on Industrial Engineering and other Applications of Applied Intelligent Systems, page 631--640. Berlin, Heidelberg, Springer-Verlag, (2010)
- Active Media Technology, volume 5820 of Lecture Notes in Computer Science, Springer, Berlin / Heidelberg, (2009)


user