1. K. Compton, J. Huggins, and W. Shen. A Semantic Model for the State Machine in the Unified Modeling Language. In Proc. Dynamic Behaviour in UML Models: Semantic Questions, pages 25–31. LMU München, Institut für Informatik, Bericht 0006, 2000.
2. Lect Notes Comput Sci;G. Engels,2000
3. Lect Notes Comput Sci;A. Evans,1999
4. M. Gogolla and F. Parisi-Presicce. State diagrams in UML: A formal semantics using graph transformations. In M. Broy, D. Coleman, T. S. E. Maibaum, and B. Rumpe, editors, Proceedings PSMT’98 Workshop on Precise Semantics for Modeling Techniques. Technische Universität München, TUM-I9803, 1998.
5. D. Harel. Statecharts: A visual formalism for complex systems. Science of Computer Programming, 8:231–274, 1987.