F. Abel, M. Frank, N. Henze, D. Krause, D. Plappert, and P. Siehndel. The Semantic Web, 6th International Semantic Web Conference,
2nd Asian Semantic Web Conference, ISWC 2007 + ASWC 2007,
Busan, Korea, November 11-15, 2007, volume 4825 of Lecture Notes in Computer Science, page 871-878. Springer, (2007)