1. Mechanizable proofs about parallel processes;Cadiou;Proc. 14th Ann. IEEE Symp. on Switching and Automata Theory,1973
2. Concepts for programming language semantics;Constable;Proc. 7th ACM Symp. on Theory of Comput.,1975
3. Initial algebra semantics;Goguen;Proc. 15th IEEE Symp. on Switching and Automata Theory,1974
4. Induction rules and termination proofs;Hitchcock,1973