D. Sonntag, P. Wennerberg, P. Buitelaar, und S. Zillner. Cases on Semantic Interoperability for Information Systems Integration: Practices and Applications, Kapitel 8, IGI Global, Hershey, PA, (2009)
M. Möller, S. Regel, und M. Sintek. The Semantic Web: Research and Applications, 6th European Semantic Web Conference, ESWC 2009, Heraklion, Crete, Greece, Volume 5554 von Lecture Notes in Computer Science, Springer, Berlin, (2009)