1. Denotational semantics of concurrency;de Bakker,1982
2. Fundamental Properties of Infinite Trees;Courcelle;Report No. 8105, Uer de Mathématique et Informatique Bordeaux,1981
3. Monadic computation and iterative algebraic theories;Elgot,1973
4. On observing nondeterminism and concurrency;Hennessy;Lecture Notes in Computer Science,1973
5. A Theory of Communicating Sequential Processes;Hoare,1981