M. Haouach, G. Venturini, und C. Guinot. HT '09: Proceedings of the Twentieth ACM Conference on Hypertext and Hypermedia, New York, NY, USA, ACM, (Juli 2009)
S. Kuznetsov, und S. Obiedkov. Principles of Data Mining and Knowledge Discovery, Seite 289--300. Berlin, Heidelberg, Springer Berlin Heidelberg, (2001)