1. A cook's tour of countable nondeterminism;Apt,1981
2. Operational and denotational semantics of nets of processes;Arnold;Laboratoire Informatique Théoretique et Programmation, Université P. et M. Curie, Université Paris 7, Rept. No. 79-35,1979
3. Nondeterministic recursive program schemes;Arnold,1977
4. Arvind and K.P. Gostelow, Some relationships between asynchronous interpreters of a dataflow language, in: [72] 96–119.
5. Sharing in nondeterminism;Astesiano,1979