G. Pandurangan, P. Raghavan, and E. Upfal. Proceedings of the 8th Annual International Computing and Combinatorics Conference (COCOON), volume 2387 of Lecture Notes in Computer Science, page 330--390. Singapore, Springer, (August 2002)
J. Kleinberg, R. Kumar, P. Raghavan, S. Rajagopalan, and A. Tomkins. Proceedings of the 5th Annual International Computing and Combinatorics Conference (COCOON), volume 1627 of Lecture Notes in Computer Science, page 1--18. Tokyo, Japan, Springer, (1999)
K. Bharat, and M. Henzinger. Proceedings of the 21st Annual International ACM SIGIR Conference on Research and Development in Information Retrieval, page 104--111. Melbourne, Australia, ACM Press, New York, (August 1998)
K. Bharat, B. Chang, M. Henzinger, and M. Ruhl. International Conference on Data Mining (ICDM), page 51--58. San Jose, California, USA, IEEE CS, (2001)