R. Stecher, G. Demartini, und C. Niederée. 10th International Conference Information Integration and Web-based Applications & Services, Linz, Austria, (November 2008)
B. Krause, R. Jäschke, A. Hotho, und G. Stumme. HT '08: Proceedings of the nineteenth ACM conference on Hypertext and hypermedia, Seite 157--166. New York, NY, USA, ACM, (2008)