R. Krestel, P. Fankhauser, and W. Nejdl. RecSys '09: Proceedings of the third ACM conference on Recommender systems, page 61--68. New York, NY, USA, ACM, (2009)
T. Iofciu, P. Fankhauser, F. Abel, and K. Bischoff. Proc. of 5th International Conference on Weblogs and Social Media, 17-21 July 2011, Barcelona, Spain., (2011)
C. Kohlschütter, P. Fankhauser, and W. Nejdl. Proc. of 3rd ACM International Conference on Web Search and Data Mining New York City, NY USA (WSDM 2010)., (2010)
E. Demidova, P. Fankhauser, X. Zhou, and W. Nejdl. Proc. of 33rd Annual International ACM SIGIR Conference on Research and Development in Information Retrieval, SIGIR 2010, Geneva, Switzerland, July 19-23, 2010., (2010)