J. Leskovec, and C. Faloutsos. KDD '06: Proceedings of the 12th ACM SIGKDD international conference on Knowledge discovery and data mining, page 631--636. New York, NY, USA, ACM Press, (2006)
J. Leskovec, S. Dumais, and E. Horvitz. WWW '07: Proceedings of the 16th international conference on World Wide Web, page 471--480. New York, NY, USA, ACM Press, (2007)
J. Leskovec, J. Kleinberg, and C. Faloutsos. KDD '05: Proceeding of the eleventh ACM SIGKDD international conference on Knowledge discovery in data mining, page 177--187. New York, NY, USA, ACM Press, (2005)