J. Leskovec, K. Lang, und M. Mahoney. Proceedings of the 19th international conference on World wide web, Seite 631--640. New York, NY, USA, ACM, (2010)
J. Leskovec, und C. Faloutsos. Proceedings of the 12th ACM SIGKDD international conference on Knowledge discovery and data mining, Seite 631--636. ACM, (2006)