S. Doerfel, R. Jäschke, and G. Stumme. Formal Concept Analysis - 10th International Conference, ICFCA 2012, Leuven, Belgium, May 7-10, 2012. Proceedings, volume 7278 of Lecture Notes in Computer Science, page 77-95. Berlin/Heidelberg, Springer, (2012)
R. Yan, J. Tang, X. Liu, D. Shan, and X. Li. Proceedings of the 20th ACM international conference on Information and knowledge management, page 1247--1252. New York, NY, USA, ACM, (2011)