user- WSDM '10: Proceedings of the Third ACM International Conference on Web Search and Data Mining, page 71--80. New York, NY, USA, ACM, (2010)
- RecSys '08: Proceedings of the 2008 ACM conference on Recommender systems, page 259--266. New York, NY, USA, ACM, (2008)
- RecSys '09: Proceedings of the 2009 ACM Conference on Recommender Systems, New York, NY, USA, ACM, (2009)to appear .
- Proceedings of the Collaborative Web Tagging Workshop at the WWW 2006, Edinburgh, Scotland, (May 2006)
- Knowledge Discovery in Databases: PKDD 2007, 11th European Conference on Principles and Practice of Knowledge Discovery in Databases, Warsaw, Poland, September 17-21, 2007, Proceedings, volume 4702 of Lecture Notes in Computer Science, page 506-514. Springer, (2007)
