In: Klaus Tochtermann; Hermann Maurer (Hrsg.). Proceedings of I-KNOW '09 and I-SEMANTICS '09. International Conference on Knowledge Management and New Media Technology (I-KNOW-09), September 2-4, Graz, Austria, Pages 348-353, ISBN ISSN 0948-6968, Journal of Universal Computer Science, Graz, Austria, 2009.
