References
Andrews, Peter B. 1986. An Introduction to Mathematical Logic and
Type Theory: To Truth Through Proof. Computer Science and Applied
Mathematics Series. Academic Press.
Church, Alonzo. 1940. “A Formulation of the Simple Theory of
Types.” Journal of Symbolic Logic 5: 56–68.
Milner, R., M. Tofte, and R. Harper. 1990. The Definition of
Standard ML. MIT Press.
Spivey, M. 1989. The Z Notation. Prentice-Hall.