1. Lecture Notes in Computer Science;M Rosa La,2010
2. Rubin, J., Chechik, M., Easterbrook, S.: Declarative approach for model composition. In: MiSE 2008, pp. 7–14. ACM (2008)
3. Lecture Notes in Computer Science;M Widl,2013
4. OMG: UML: Superstructure. Version 2.4.1. OMG (2011). http://www.omg.org , Document id: formal/2011-08-06. Accessed 1 June 2012
5. Winskel, G., Nielsen, M.: Models for concurrency. In: Abramsky, S., Gabbay, D., Maibaum, T. (eds.) Handbook of Logic in Computer Science. Semantic Modelling, vol. 4, pp. 1–148. Oxford Science Publications (1995)