@article{1183735107,
author = {Smullyan, Raymond M.},
title = {Analytic Natural Deduction},
journal = {J. Symbolic Logic},
volume = {30},
number = {1},
year = {1965},
pages = { 123-139},
language = {en},
url = {http://dml.mathdoc.fr/item/1183735107}
}
Smullyan, Raymond M. Analytic Natural Deduction. J. Symbolic Logic, Tome 30 (1965) no. 1, pp. 123-139. http://gdmltest.u-ga.fr/item/1183735107/