D. Benz, A. Hotho, R. Jäschke, G. Stumme, A. Halle, A. Lima, H. Steenweg, and S. Stefani. Proceedings of the European Conference on Research and Advanced Technology for Digital Libraries (ECDL) 2010, volume 6273 of Lecture Notes in Computer Science, page 417--420. Berlin/Heidelberg, Springer, (2010)
S. Doerfel. Concept Lattices and Their Applications 2010 - Proceedings of the 7th International Conference on Concept Lattices and Their Applications Sevilla, Spain, October 19-21, 2010., 672, page 283-293. CEUR-WS, (November 2010)