1. Proc. Internat. Workshop on Semantics of Specification Languages,1993
2. An algebraic characterization of transition system equivalences;Arnold;Inform. and Comput.,1989
3. Proc. 1st Conf. on Theories of Concurrency, CONCUR '90,1990
4. Process Algebra;Baeten,1990
5. Proc. 11th ICALP;Bergstra,1984