1. S. Abramsky. Reasoning about concurrent systems: a functional approach. In F. Chambers, D. Duce, and G. Jones, editors, Distributed Computing, volume 20 of APIC Studies in Data Processing, pages 307–319. Academic Press, 1984.
2. M. A. Arbib and E. Manes. Arrows, Structures and Functors: the Categorical Imperative. Academic Press, 1975.
3. J. D. Brock and W. B. Ackerman. Scenarios: a model of nondeterminate computation. In Formalization of Programming Concepts, pages 252–259. Springer-Verlag, 1981. Lecture Notes in Computer Science Vol. 107.
4. H. Barendregt. The Lambda Calculus: Its Syntax and Semantics. North-Holland, revised edition, 1984.
5. T. Coquand, C. Gunter, and G. Winskel. dI-domains as a model of polymorphism. In Third Workshop on the Mathematical Foundations of Programming Language Semantics, pages 344–363. Springer-Verlag, 1987.