B. Miller, J. Riedl, и K. Konstan. 1997 Annual Technical Conference, January 6--10, 1997.
Anaheim, CA, USA, стр. 219--233. Berkeley, CA, USA, USENIX, (1997)
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, стр. 230--237. (1999)