A. Schein, A. Popescul, L. Ungar, и D. Pennock. Proceedings of the 25th annual international ACM SIGIR conference
on Research and development in information retrieval, (253--260)
N. Kushmerick, J. McKee, и F. Toolan. Proceedings of the International Conference on Adaptive Hypermedia
and Adaptive Web-based Systems, стр. 133--143. (2000)
J. Herlocker, J. Konstan, A. Borchers, и J. Riedl. Proceedings of the 22nd Annual International ACM SIGIR Conference
on Research and Development in Information Retrieval, (1999)