"Theory of Formal Systems: Annals of Mathematics Studies", Princeton University Press (April 1, 1961) 156 pages ISBN 0-691-08047-X* S. C. Kleene, 1967.
"Theory of Formal Systems: Annals of Mathematics Studies", Princeton University Press (April 1, 1961) 156 pages ISBN 0-691-08047-X* S. C. Kleene, 1967.