@article{1093957242,
author = {Soboci\'nski, Boles\l aw},
title = {An axiom-system for $\{K;\,N\}$-propositional calculus related to Simons' axiomatization of ${\rm S}3$.},
journal = {Notre Dame J. Formal Logic},
volume = {3},
number = {1},
year = {1962},
pages = { 206-208},
language = {en},
url = {http://dml.mathdoc.fr/item/1093957242}
}
Sobociński, Bolesław. An axiom-system for $\{K;\,N\}$-propositional calculus related to Simons' axiomatization of ${\rm S}3$.. Notre Dame J. Formal Logic, Tome 3 (1962) no. 1, pp. 206-208. http://gdmltest.u-ga.fr/item/1093957242/