R. Straeten, T. Mens, J. Simmonds, und V. Jonckers. UML 2003 – The Unified Modeling Language, Volume 2863 von Lecture Notes in Computer Science, Seite 326--340. Springer, (2003)
A. Evans. WIFT '98: Proceedings of the Second IEEE Workshop on Industrial Strength Formal Specification Techniques, Seite 102. Washington, DC, USA, IEEE Computer Society, (1998)
A. Cal&\#236;, D. Calvanese, G. Giacomo, und M. Lenzerini. ISMIS '02: Proceedings of the 13th International Symposium on Foundations of Intelligent Systems, Seite 503--513. London, UK, Springer-Verlag, (2002)
A. Evans, R. France, K. Lano, und B. Rumpe. &\#171;UML&\#187; '98: Selected papers from the First International Workshop on The Unified Modeling Language &\#171;UML&\#187;'98, Seite 336--348. London, UK, Springer-Verlag, (1999)