1. A.S. Evans, R.B. France, K.C. Lano, and B. Rumpe, Towards a core meta modelling semantics of UML, Behavoral Specifications for Businesses and Systems (Haim Kilov, ed.), Kluwer Press, 1999, To appear.
2. Lect Notes Comput Sci;J.-M. Bruel,1998
3. G. Booch, J. Rumbaugh, and I. Jacobson, The Unified Modeling Language user guide, Addison-Wesley, 1998.
4. D. D’Souza and A.C. Wills, Objects, components and frameworks with UML, Object Technology Series, Addison-Wesley, 1998.
5. Lect Notes Comput Sci;A. Evans,1998