A. N. Prior. Existence in Leśniewski and in Russell. Formal systems and recursive functions, Proceedings of the Eighth Logic Colloquium, Oxford, July 1963, edited by J. N. Crossley and M. A. E. Dummett, Studies in logic and the foundations of mathematics, North-Holland Publishing Company, Amsterdam1965, pp. 149–155.
1975 ◽
Vol 40
(3)
◽
pp. 458-458