@article{1183731641,
author = {Marcus, Ruth Barcan},
title = {Strict Implication, Deducibility and the Deduction Theorem},
journal = {J. Symbolic Logic},
volume = {18},
number = {1},
year = {1953},
pages = { 234-236},
language = {en},
url = {http://dml.mathdoc.fr/item/1183731641}
}
Marcus, Ruth Barcan. Strict Implication, Deducibility and the Deduction Theorem. J. Symbolic Logic, Tome 18 (1953) no. 1, pp. 234-236. http://gdmltest.u-ga.fr/item/1183731641/