O. Lassila. Proceedings of the First International Semantic Web Conference, ISWC 2002, Sardinia, Italy, 2342, Seite 307-317. Springer-Verlag, Heidelberg, Germany, (Juni 2002)
J. Jürjens. FMOODS '02: Proceedings of the IFIP TC6/WG6.1 Fifth International Conference on Formal Methods for Open Object-Based Distributed Systems V, Seite 29--43. Deventer, The Netherlands, The Netherlands, Kluwer, B.V., (2002)