N. Fanizzi, C. d'Amato, and F. Esposito. The Semantic Web - ISWC 2008, 7th International Semantic Web Conference, ISWC 2008, Karlsruhe, Germany, October 26-30, 2008. Proceedings, volume 5318 of Lecture Notes in Computer Science, page 195-212. Springer, (2008)