D. Kukulenz, and A. Ntoulas. WWW '07: Proceedings of the 16th international conference on World Wide Web, page 551--560. New York, NY, USA, ACM Press, (2007)
Y. Sun, K. Xie, N. Liu, S. Yan, B. Zhang, and Z. Chen. WWW '07: Proceedings of the 16th international conference on World Wide Web, page 1141--1142. New York, NY, USA, ACM Press, (2007)
S. Chien, and N. Immorlica. WWW '05: Proceedings of the 14th international conference on World Wide Web, page 2--11. New York, NY, USA, ACM Press, (2005)
S. Beitzel, E. Jensen, A. Chowdhury, D. Grossman, and O. Frieder. SIGIR '04: Proceedings of the 27th annual international conference on Research and development in information retrieval, page 321--328. ACM Press, (2004)
M. Vlachos, C. Meek, Z. Vagena, and D. Gunopulos. SIGMOD '04: Proceedings of the 2004 ACM SIGMOD international conference on Management of data, page 131--142. New York, NY, USA, ACM Press, (2004)