@article{1093893934,
author = {Shukla, Anjan},
title = {Decision procedures for Lewis system S1 and related modal systems.},
journal = {Notre Dame J. Formal Logic},
volume = {11},
number = {1},
year = {1970},
pages = { 141-180},
language = {en},
url = {http://dml.mathdoc.fr/item/1093893934}
}
Shukla, Anjan. Decision procedures for Lewis system S1 and related modal systems.. Notre Dame J. Formal Logic, Tome 11 (1970) no. 1, pp. 141-180. http://gdmltest.u-ga.fr/item/1093893934/