A. Hotho, R. Jäschke, C. Schmitz, and G. Stumme. The Semantic Web: Research and Applications, volume 4011 of LNAI, page 411-426. Heidelberg, Springer, (June 2006)
M. Nurminen, A. Honkaranta, and T. Kärkkäinen. International workshop on Integrating Data Mining, Databases and Information Retrieval (IDDI'05), Proceedings of the 16th International Workshop on Database and Expert Systems Applications, page 1036-1040. IEEE Computer Society, (2005)
A. Theobald, and G. Weikum. Proceedings of the 8th International Conference on Extending Database Technology, volume 2287 of Lecture Notes in Computer Science, page 477-495. Springer-Verlag, (2002)