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, B. Chang, M. Henzinger, and M. Ruhl. International Conference on Data Mining (ICDM), page 51--58. San Jose, California, USA, IEEE CS, (2001)
C. Palmer, P. Gibbons, and C. Faloutsos. Proceedings of the eighth ACM SIGKDD international conference on Knowledge discovery and data mining, page 81--90. New York, NY, USA, ACM Press, (2002)