@article{1183730600, author = {Kleene, S. C.}, title = {Review: Frederic B. Fitch, An Extension of Basic Logic}, journal = {J. Symbolic Logic}, volume = {14}, number = {1}, year = {1949}, pages = { 68-69}, language = {en}, url = {http://dml.mathdoc.fr/item/1183730600} }
Kleene, S. C. Review: Frederic B. Fitch, An Extension of Basic Logic. J. Symbolic Logic, Tome 14 (1949) no. 1, pp. 68-69. http://gdmltest.u-ga.fr/item/1183730600/