J. Broekstra, A. Kampman, and F. van Harmelen. The Semantic Web -- ISWC 2002: First International Semantic Web Conference Sardinia, Italy, volume 2342 of Lecture Notes in Computer Science, Springer, Berlin, (2002)
C. Pautasso, O. Zimmermann, and F. Leymann. Proceedings of the 17th international conference on World Wide Web, page 805--814. New York, NY, USA, ACM, (2008)