S. Hauger, K. Tso, and L. Schmidt-Thieme. The 31st Annual Conference of the German Classification Society on Data Analysis, Machine Learning, and Applications, (2007)
A. Schein, A. Popescul, L. Ungar, and D. Pennock. SIGIR '02: Proceedings of the 25th annual international ACM SIGIR conference on Research and development in information retrieval, page 253--260. New York, NY, USA, ACM Press, (2002)
E. Gabrilovich, S. Dumais, and E. Horvitz. WWW '04: Proceedings of the 13th international conference on World Wide Web, page 482--490. New York, NY, USA, ACM Press, (2004)