J. Hopcroft, T. Lou, und J. Tang. Proceedings of the 20th ACM International Conference on Information and Knowledge Management, Seite 1137--1146. New York, NY, USA, ACM, (2011)
C. Wang, J. Han, Y. Jia, J. Tang, D. Zhang, Y. Yu, und J. Guo. Proceedings of the 16th ACM SIGKDD International Conference on Knowledge Discovery and Data Mining, Seite 203--212. New York, NY, USA, ACM, (2010)