1. Designing Object Systems-object Oriented Modeling with Syntropy;Cook,1994
2. Using UML/OCL constraints for relational database design;Demuth;Lecture Notes in Computer Science,1999
3. OCL as a specification language for business rules in database applications;Demuth;Lecture Notes in Computer Science,2001
4. Demuth, B., Hußmann, H., Loecher, S., Zschaler, S., 2004. Structure of the Dresden OCL toolkit. In: Second International Fujaba days “MDA with UML and rule-based object manipulation”. Darmstadt, Germany, September 15–17, 2004, .
5. Duboisset, M., Pinet, F., Kang, M.A., Schneider, M., 2005. Integrating the calculus-based method into OCL: study of expressiveness and code generation. In: Proceedings of the 16th International Workshop on Database and Expert Systems Applications. Copenhagen, Denmark, August 22–26, pp. 502–506.