Y. Sun, Z. Zhuang, and C. Giles. Poster Proceedings of the 16th International World Wide Web Conference, page 1123-1124. Banff, Alberta, ACM Press, (May 2007)
Y. Sun, Z. Zhuang, and L. Giles. WWW '07: Proceedings of the 16th international conference on World Wide Web, page 1123--1124. New York, NY, USA, ACM Press, (2007)