S. Bloehdorn, и Y. Sure. The Semantic Web --- Proceedings of the 6th International Semantic Web Conference and the 2nd Asian Semantic Web Conference (ISWC 2007 + ASWC 2007), November 11-15, 2007, Busan, Korea, том 4825 из Lecture Notes in Computer Science, стр. 58--71. Springer, Berlin--Heidelberg, Germany, (2007)