B. Liu, R. Jones, and K. Klinkner. CIKM '06: Proceedings of the 15th ACM international conference on Information and knowledge management, page 836--837. New York, NY, USA, ACM Press, (2006)
A. Hotho, R. Jäschke, C. Schmitz, and G. Stumme. Proc. First International Conference on Semantics And Digital Media Technology (SAMT), volume 4306 of LNCS, page 56-70. Heidelberg, Springer, (2006)
A. Hotho, R. Jäschke, C. Schmitz, and G. Stumme. The Semantic Web: Research and Applications, volume 4011 of LNAI, page 411-426. Heidelberg, Springer, (2006)
R. Fagin, R. Kumar, and D. Sivakumar. SODA '03: Proceedings of the fourteenth annual ACM-SIAM symposium on Discrete algorithms, page 28--36. Philadelphia, PA, USA, Society for Industrial and Applied Mathematics, (2003)
T. Joachims, L. Granka, B. Pan, H. Hembrooke, and G. Gay. SIGIR '05: Proceedings of the 28th annual international ACM SIGIR conference on Research and development in information retrieval, page 154--161. New York, NY, USA, ACM Press, (2005)