6Herlocker J K, Konstan JA, Borchers A, et al. An Algorithmic Framework for Performing Collaborative Filtering[C]. Proceedings of ACM SIGIR 99, ACM press, 1999.
8Resnick P,et al. GroupLens: An open architecture for collaborative filtering of netnews. In: Proc. of 1994 Conf. on Computer Supported Collaborative Work, 1994. 175~ 186
9Konstan J A ,et al. GroupLens: Applying collaborative filtering to Usenet news. Communications of the ACM, 1997, 40(3) :77~87
10Herlocker J L, et al. An algorithmic framework for performing collaborative filtering. In:Proc. of the 22nd annual intl. ACM SIGIR conf. on Research and development in information retrieval,1999