@article{1183730862,
author = {Quine, W. V.},
title = {On Natural Deduction},
journal = {J. Symbolic Logic},
volume = {14},
number = {4},
year = {1950},
pages = { 93-102},
language = {en},
url = {http://dml.mathdoc.fr/item/1183730862}
}
Quine, W. V. On Natural Deduction. J. Symbolic Logic, Tome 14 (1950) no. 4, pp. 93-102. http://gdmltest.u-ga.fr/item/1183730862/