Paul Lorenzen. Die Fiktion der Überabzählbarkeit. Proceedings of the International Congress of Mathematicians 1954, Amsterdam September 2-September 9, Volume III, Erven P. Noordhoff N.V., Groningen1956, and North-Holland Publishing Co., Amsterdam 1956, pp. 273–279.
1957 ◽
Vol 22
(4)
◽
pp. 368-369