@article{1093957155,
author = {Soboci\'nski, Boles\l aw},
title = {A note on the regular and irregular modal systems of Lewis.},
journal = {Notre Dame J. Formal Logic},
volume = {3},
number = {1},
year = {1962},
pages = { 109-113},
language = {en},
url = {http://dml.mathdoc.fr/item/1093957155}
}
Sobociński, Bolesław. A note on the regular and irregular modal systems of Lewis.. Notre Dame J. Formal Logic, Tome 3 (1962) no. 1, pp. 109-113. http://gdmltest.u-ga.fr/item/1093957155/