@article{1093893943,
author = {Setlur, Rangaswamy V.},
title = {On the equivalence of strong and weak validity of rule schemes in the two-valued propositional calculus.},
journal = {Notre Dame J. Formal Logic},
volume = {11},
number = {1},
year = {1970},
pages = { 249-253},
language = {en},
url = {http://dml.mathdoc.fr/item/1093893943}
}
Setlur, Rangaswamy V. On the equivalence of strong and weak validity of rule schemes in the two-valued propositional calculus.. Notre Dame J. Formal Logic, Tome 11 (1970) no. 1, pp. 249-253. http://gdmltest.u-ga.fr/item/1093893943/