1. ECMA-ANSI, PL/I-BASIS/I, ECMA/TC 10, ANSI.X3J1 (July, 1974)
2. Berry, D.M.: The Equivalence of Models of Tasking. Proc. ACM Conference on Proving Assertions about Programs, SIGPLAN Notices 7:1 1972
3. Berry, D.M.: A Denotational Semantics for Shared-Memory Parallelism and Nondeterminism: A Relation Between Denotational and Vienna Definition Language Semantics. Computer Science Dept., UCLA 1982
4. Berry, D.M., Wegner, P.: Adding Labels to EPL. Faculty of Mathematics, Hebrew University, Jerusalem, Israel 1972
5. de Bakker, J.W., Zucker, J.I.: Denotational Semantics of Concurrency. Proc. Fourteenth Annual ACM Symposium of the Theory of Computing, 5?7 May 1982, San Francisco, CA, 1982