R. Kern, C. Körner, and M. Strohmaier. Proceedings of the 14th European conference on Research and advanced technology for digital libraries, page 461--465. Berlin, Heidelberg, Springer-Verlag, (2010)
R. Wetzker, C. Zimmermann, C. Bauckhage, and S. Albayrak. Proceedings of the third ACM international conference on Web search and data mining, page 71--80. New York, NY, USA, ACM, (2010)
A. Hotho, R. Jäschke, C. Schmitz, and G. Stumme. The Semantic Web: Research and Applications, volume 4011 of Lecture Notes in Computer Science, page 411--426. Berlin/Heidelberg, Springer, (June 2006)
D. Helic, and M. Strohmaier. Proceedings of the 20th ACM international conference on Information and knowledge management, page 525--534. New York, NY, USA, ACM, (2011)