@article{1183493359,
author = {Bernstein, B. A.},
title = {Irredundant sets of postulates for the logic of propositions},
journal = {Bull. Amer. Math. Soc.},
volume = {35},
number = {6},
year = {1929},
pages = { 545-548},
language = {en},
url = {http://dml.mathdoc.fr/item/1183493359}
}
Bernstein, B. A. Irredundant sets of postulates for the logic of propositions. Bull. Amer. Math. Soc., Tome 35 (1929) no. 6, pp. 545-548. http://gdmltest.u-ga.fr/item/1183493359/