1. Lecture Notes in Computer Science;K. Anastasakis,2007
2. Apt, K.R., Wallace, M.G.: Constraint Logic Programming using ECLiPSe. Cambridge University Press, Cambridge (2007)
3. Lecture Notes in Computer Science;A. Artale,2007
4. Berardi, D., Calvanese, D., Giacomo, G.D.: Reasoning on UML class diagrams. Artificial Intelligence 168, 70–118 (2005)
5. Booch, G., Rumbaugh, J., Jacobson, I.: The Unified Modeling Language User Guide. Addison-Wesley, Reading (1998)