Y. Liu, B. Gao, T. Liu, Y. Zhang, Z. Ma, S. He, und H. Li. Proceedings of the 31st annual international ACM SIGIR conference on Research and development in information retrieval, Seite 451--458. New York, NY, USA, ACM, (2008)
A. Hotho, R. Jäschke, C. Schmitz, und G. Stumme. The Semantic Web: Research and Applications, Volume 4011 von Lecture Notes in Computer Science, Seite 411-426. Heidelberg, Springer, (Juni 2006)
P. Desikan, N. Pathak, J. Srivastava, und V. Kumar. ICWE '06: Proceedings of the 6th international conference on Web engineering, Seite 233--240. New York, NY, USA, ACM Press, (Juli 2006)