S. Chen, J. Moore, D. Turnbull, und T. Joachims. Proceedings of the 18th ACM SIGKDD international conference on Knowledge discovery and data mining, Seite 714--722. New York, NY, USA, ACM, (2012)
A. Bakalov, A. McCallum, H. Wallach, und D. Mimno. Proceedings of the 12th ACM/IEEE-CS Joint Conference on Digital Libraries, Seite 237--240. New York, NY, USA, ACM, (2012)