B. Krause, C. Schmitz, A. Hotho, и G. Stumme. AIRWeb '08: Proceedings of the 4th International Workshop on Adversarial Information Retrieval on the Web, стр. 61--68. New York, NY, USA, ACM, (Апрель 2008)
S. Doerfel, R. Jäschke, A. Hotho, и G. Stumme. Proceedings of the 4th ACM RecSys workshop on Recommender systems and the social web, стр. 9--16. New York, NY, USA, ACM, (Сентябрь 2012)