W. Maass, and A. Filler. Proceedings of Workshop on Making Semantics Work For Business (MSWFB 2007), part of 1st European Semantic Technology Conference, page 12-17. Vienna, Austria, (2007)
S. Janzen, T. Kowatsch, W. Maass, and A. Filler. ISWC'10 Proceedings of the 9th international semantic web conference on The semantic web - Volume Part II, volume 6497 of LNCS, Berlin, Heidelberg, Springer, (2010)