A. Hotho, R. Jäschke, C. Schmitz, and G. Stumme. Proc. Workshop on Applications of Semantic Technologies, Informatik 2006, P-94, Dresden, (October 2006)
A. Hotho, R. Jäschke, C. Schmitz, and G. Stumme. Proceedings of the 3rd European Semantic Web Conference, volume 4011 of LNCS, page 411-426. Budva, Montenegro, Springer, (June 2006)
F. Mitzlaff, D. Benz, G. Stumme, and A. Hotho. Proceedings of the 21st ACM conference on Hypertext and hypermedia, page 265--270. New York, NY, USA, ACM, (2010)