1. Lect Notes Comput Sci;M. Bidoit,1999
2. Brickford, M., Guaspari, D.: Lightweight Analysis of UML. Draft Technical Report, Odyssey Research Associates, 1998.
3. Cheesman, J., Daniels, J.: UML Components. Addison-Wesley, 2001
4. Lect Notes Comput Sci;F.L. Bauer,1985
5. Lect Notes Comput Sci;B. Demuth,1999