A. Hotho, R. Jäschke, C. Schmitz, and G. Stumme. Proceedings of the 3rd European Semantic Web Conference (accepted for publication), Budva, Montenegro, (June 2006)
B. Berendt, A. Hotho, and G. Stumme. International Semantic Web Conference, volume 2342 of Lecture Notes in Computer Science, page 264 - 278. Springer Verlag, (2002)
G. Stumme, and A. Maedche. IJCAI-2001 -- Proceedings of the 17th International Joint Conference on Artificial Intelligence, Seattle, USA, August, 1-6, 2001, page 225--234. San Francisco, Morgen Kaufmann, (2001)