Christoph Bussler, Dieter Fensel, Maria E. Orlowska, Jian Yang: Web Services, E-Business, and the Semantic Web, Second International Workshop, WES 2003, Klagenfurt, Austria, June 16-17, 2003, Revised Selected Papers. Lecture Notes in Computer Science 3095, Springer 2004, ISBN 3-540-22396-7