J. Leskovec, und E. Horvitz. WWW '08: Proceeding of the 17th international conference on World Wide Web, Seite 915--924. New York, NY, USA, ACM, (2008)
J. Leskovec, und C. Faloutsos. Proceedings of the 12th ACM SIGKDD international conference on Knowledge discovery and data mining, Seite 631--636. ACM, (2006)