@article{1183389102, author = {Quine, W. V. and Goodman, Nelson}, title = {Elimination of Extra-Logical Postulates}, journal = {J. Symbolic Logic}, volume = {5}, number = {1}, year = {1940}, pages = { 104-109}, language = {en}, url = {http://dml.mathdoc.fr/item/1183389102} }
Quine, W. V.; Goodman, Nelson. Elimination of Extra-Logical Postulates. J. Symbolic Logic, Tome 5 (1940) no. 1, pp. 104-109. http://gdmltest.u-ga.fr/item/1183389102/