@article{1183731101, author = {Fitch, Frederic B.}, title = {A Demonstrably Consistent Mathematics--Part II}, journal = {J. Symbolic Logic}, volume = {16}, number = {1}, year = {1951}, pages = { 121-124}, language = {en}, url = {http://dml.mathdoc.fr/item/1183731101} }
Fitch, Frederic B. A Demonstrably Consistent Mathematics--Part II. J. Symbolic Logic, Tome 16 (1951) no. 1, pp. 121-124. http://gdmltest.u-ga.fr/item/1183731101/