B. Chidlovskii, N. Glance, and M. Grasso. In The National Conference on Artificial Intelligence 2000 Workshop on AI for Web Search, page 18--23. (2000)
B. Yaltaghian, and M. Chignell. CASCON '02: Proceedings of the 2002 conference of the Centre for Advanced Studies on Collaborative research, IBM Press, (2002)