T. Joachims. Proceedings of the eighth ACM SIGKDD international conference on Knowledge discovery and data mining, стр. 133--142. New York, NY, USA, ACM, (2002)
B. Krause, R. Jäschke, A. Hotho, и G. Stumme. HT '08: Proceedings of the Nineteenth ACM Conference on Hypertext and Hypermedia, стр. 157-166. New York, NY, USA, ACM, (2008)