- HT '09: Proceedings of the Twentieth ACM Conference on Hypertext and Hypermedia, New York, NY, USA, ACM, (July 2009)
- Electronic Notes in Theoretical Computer Science (January 2008)
- Journal of Relational Methods in Computer Science (2008)
- Machine Learning 27(3):313--331 (1997)
- ICEC '08: Proceedings of the 10th international conference on Electronic commerce, page 1--10. Innsbruck, Austria, ACM, (2008)
- Communication ACM 40(3):77--87 (1997)
- Papers from the AAAI Workshop, AAAI Technical Report WS-00-04, page 74-77. Menlo Park, CA: AAAI Press, (2000)
- The 6th Hellenic European Conference on Computer Mathematics \& its Applications HERCMA, Athens, Greece, (2003)
- IUI '09: Proceedings of the 13th international conference on Intelligent user interfaces, page 47--56. New York, NY, USA, ACM, (2008)
- HT'09: Proceedings of the 20th ACM conference on Hypertext and Hypermedia, page 73--82. New York, NY, USA, ACM, (2009)
- (1989)
- ACM Trans. Program. Lang. Syst. 15(5):795--825 (1993)
- UIST '03: Proceedings of the 16th annual ACM symposium on User interface software and technology, page 1--10. New York, NY, USA, ACM, (2003)
- IUI '09: Proceedings of the 13th International Conference on Intelligent User Interfaces, page 407--412. New York, NY, USA, ACM, (2009)
- RecSys '08: Proceedings of the 2008 ACM Conference on Recommender Systems, page 115--122. New York, NY, USA, ACM, (2008)
- RecSys '08: Proceedings of the 2008 ACM Conference on Recommender Systems, page 19--26. New York, NY, USA, ACM, (2008)
- RecSys '08: Proceedings of the 2008 ACM Conference on Recommender Systems, page 227--234. New York, NY, USA, ACM, (2008)
- RecSys '08: Proceedings of the 2008 ACM Conference on Recommender Systems, page 275--282. New York, NY, USA, ACM, (2008)
- RecSys '08: Proceedings of the 2008 ACM conference on Recommender Systems, page 259--266. New York, NY, USA, ACM, (2008)
- Artificial Intelligence 135(1-2):125--143 (2002)


user