L. Kalmár. On unsolvable mathematical problems. Actes du Χme Congrès International de Philosophie (Amsterdam, 11–18 août, 1948)—Proceedings of the Tenth International Congress of Philosophy (Amsterdam, August 11–18, 1948), North-Holland Publishing Company, Amsterdam1949, pp. 756–758.
1949 ◽
Vol 14
(2)
◽
pp. 130-131