Lawrence D. Bergman Jihie Kim Bamshad Mobasher Stefan M. Rüger Stefan Siersdorfer Sergej Sizov Markus Stolze International workshop on recommendation and collaboration (ReColl 2008). 439 2008 IUI http://doi.acm.org/10.1145/1378773.1378859 conf/iui/2008 db/conf/iui/iui2008.html#BergmanKMRSSS08