S. Bateman, C. Gutwin, and M. Nacenta. Proceedings of the nineteenth ACM conference on Hypertext and hypermedia, page 193--202. New York, NY, USA, ACM, (2008)
M. Prilla. Proceedings of 11th International Conference on Business Information
Systems, BIS 2008, Innsbruck, Austria, page 130-141. Innsbruck, Austria, (2008)
A. Hotho, R. Jaschke, C. Schmitz, and G. Stumme. Prof. First International Conference on Semantics And Digital Media
Technology (SAMT), Athens, Greece, dec, Springer, (2006)