@article{1093957981,
author = {Soboci\'nski, Boles\l aw},
title = {Family ${\rm K}$ of the non-Lewis modal systems.},
journal = {Notre Dame J. Formal Logic},
volume = {5},
number = {1},
year = {1964},
pages = { 313-318},
language = {en},
url = {http://dml.mathdoc.fr/item/1093957981}
}
Sobociński, Bolesław. Family ${\rm K}$ of the non-Lewis modal systems.. Notre Dame J. Formal Logic, Tome 5 (1964) no. 1, pp. 313-318. http://gdmltest.u-ga.fr/item/1093957981/