M. O'Connor, and J. Herlocker. Proceedings of the ACM SIGIR Workshop on Recommender Systems: Algorithms and Evaluation, Berkeley, California, USA, (August 1999)
B. Sarwar, G. Karypis, J. Konstan, and J. Reidl. Proceedings of the 5th International Conference on Computer and Information Technology (ICCIT), (2002)
R. Agrawal, J. Gehrke, D. Gunopulos, and P. Raghavan. Proceedings of the ACM SIGMOD Int'l Conference on Management of Data, Seattle, Washington, page 94--105. ACM Press, (June 1998)
Y. Yue, C. Wang, K. El-Arini, and C. Guestrin. Proceedings of the 23rd international conference on World wide web, page 75--84. International World Wide Web Conferences Steering Committee, (2014)