R. Angelova, und G. Weikum. SIGIR '06: Proceedings of the 29th annual international ACM SIGIR conference on Research and development in information retrieval, Seite 485--492. New York, NY, USA, ACM, (2006)
C. Kunzmann, und A. Schmidt. I-KNOW ´09, 9th International Conference on Knowledge Management and Knowledge Technologies, 2-4 September, Graz, (2009)MATURE.