D. Lymberopoulos, P. Zhao, C. Konig, K. Berberich, und J. Liu. Proceedings of the 20th ACM international conference on Information and knowledge management, Seite 413--422. New York, NY, USA, ACM, (2011)
J. Li, S. Huffman, und A. Tokuda. 32nd Annual International ACM SIGIR Conference on Research and Development in Information Retrieval, Seite 43-50. (2009)
A. Amin, S. Townsend, J. van Ossenbruggen, und L. Hardman. Human-Computer Interaction – INTERACT 2009, Volume 5726 von Lecture Notes in Computer Science, Springer, Berlin / Heidelberg, (2009)
A. Stocker, und K. Tochtermann. 1st International Joint Conference on Knowledge Discovery, Knowledge Engineering and Knowledge Management, 1 (18):
297-309(2011)