H. Grosskreutz, S. Rüping, и S. Wrobel. ECML PKDD '08: Proceedings of the 2008 European Conference on Machine Learning and Knowledge Discovery in Databases - Part I, стр. 440--456. Berlin, Heidelberg, Springer-Verlag, (2008)
M. Zaki. CIKM '98: Proceedings of the seventh international conference on Information and knowledge management, стр. 68--75. New York, NY, USA, ACM, (1998)