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)
M. McGlohon, L. Akoglu, и C. Faloutsos. KDD '08: Proceeding of the 14th ACM SIGKDD international conference on Knowledge discovery and data mining, стр. 524--532. New York, NY, USA, ACM, (2008)