T. Crook, B. Frasca, R. Kohavi, and R. Longbotham. Proceedings of the 15th ACM SIGKDD International Conference on Knowledge Discovery and Data Mining, page 1105--1114. New York, NY, USA, ACM, (2009)
T. Yamauchi. Proceedings of the 6th International Semantic Web Conference and 2nd Asian Semantic Web Conference (ISWC/ASWC2007), Busan, South Korea, volume 4825 of LNCS, page 603--616. Berlin, Heidelberg, Springer Verlag, (November 2007)