@article{1093893942,
author = {Setlur, Rangaswamy V.},
title = {The product of implication and counter-implication systems.},
journal = {Notre Dame J. Formal Logic},
volume = {11},
number = {1},
year = {1970},
pages = { 241-248},
language = {en},
url = {http://dml.mathdoc.fr/item/1093893942}
}
Setlur, Rangaswamy V. The product of implication and counter-implication systems.. Notre Dame J. Formal Logic, Tome 11 (1970) no. 1, pp. 241-248. http://gdmltest.u-ga.fr/item/1093893942/