@article{1183142207, author = {Kleene, S. C.}, title = {Review: Olaf Helmer, Perelman versus Godel}, journal = {J. Symbolic Logic}, volume = {2}, number = {2}, year = {1937}, pages = { 48-49}, language = {en}, url = {http://dml.mathdoc.fr/item/1183142207} }
Kleene, S. C. Review: Olaf Helmer, Perelman versus Godel. J. Symbolic Logic, Tome 2 (1937) no. 2, pp. 48-49. http://gdmltest.u-ga.fr/item/1183142207/