W. Shen, J. Wang, P. Luo, und M. Wang. Proceedings of the 19th ACM SIGKDD International Conference on Knowledge Discovery and Data Mining, Seite 68--76. New York, NY, USA, ACM, (2013)
D. Milne, und I. Witten. Proceedings of the 17th ACM Conference on Information and Knowledge Management, Seite 509--518. New York, NY, USA, ACM, (2008)