Thomas Baar Alfred Strohmeier Ana M. D. Moreira Stephen J. Mellor «UML» 2004 - The Unified Modelling Language: Modelling Languages and Applications. 7th International Conference, Lisbon, Portugal, October 11-15, 2004. Proceedings UML Lecture Notes in Computer Science 3273 2004 3-540-23307-5 Springer db/conf/uml/uml2004.html