C. Faloutsos, K. Mccurley, und A. Tomkins. KDD '04: Proceedings of the 2004 ACM SIGKDD international conference on Knowledge discovery and data mining, Seite 118--127. New York, NY, USA, ACM Press, (2004)
R. D'Amore. SIGIR '04: Proceedings of the 27th annual international ACM SIGIR conference on Research and development in information retrieval, Seite 498--499. New York, NY, USA, ACM Press, (2004)