P. Liu, J. Curson, and P. Dew. International Conference of Advanced Information Systems Engineering (CAiSE), volume 2348 of Lecture Notes in Computer Science, page 100-116. Springer, (2002)
S. Staab, M. Erdmann, A. Mädche, and S. Decker. First Workshop on the Semantic Web at the Fourth
European Conference on Digital Libraries, Lisbon, Portugal, (September 2000)
W. Nejdl, M. Wolpers, and C. Capella. Modelle und Modellierungssprachen in Informatik und Wirtschaftsinformatik, Modellierung 2000, St. Goar, Foelbach Verlag, Koblenz, (April 2000)