1. Bloom, B., S. Istrail and A. Meyer. “Bisimulation Can't Be Traced.” In Proceedings of the ACM Symposium on Principles of Programming Languages, 1988.
2. Lecture Notes in Computer Science;G. Boudol,1990
3. Brookes, S.D., C.A.R. Hoare and A.W. Roscoe. “A Theory of Communicating Sequential Processes.” Journal of the ACM, v. 31, n. 3, July 1984, pp. 560–599.
4. Lecture Notes in Computer Science;R. Cleaveland,1990
5. Cleaveland, R., J. Parrow and B. Steffen. “A Semantics-Based Tool for the Verification of Finite-State Systems.” In Proceedings of the Ninth IFIP Symposium on Protocol Specification, Testing and Verification, 287–302. North-Holland, Amsterdam, 1990.