@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/