F. Lemmerich, M. Becker, and M. Atzmueller. European Conference on Machine Learning and Knowledge Discovery in Databases, page 277--292. Berlin, Heidelberg, Springer Berlin Heidelberg, (2012)
L. Backstrom, and J. Leskovec. Proceedings of the fourth ACM international conference on Web search and data mining, page 635--644. New York, NY, USA, ACM, (2011)
B. Krause, C. Schmitz, A. Hotho, and G. Stumme. AIRWeb '08: Proceedings of the 4th International Workshop on Adversarial Information Retrieval on the Web, page 61--68. New York, NY, USA, ACM, (April 2008)