@article{1093956874,
author = {Smiley, Timothy},
title = {On \L\ ukasiewicz's ${\rm \L}$-modal system.},
journal = {Notre Dame J. Formal Logic},
volume = {2},
number = {1},
year = {1961},
pages = { 149-153},
language = {en},
url = {http://dml.mathdoc.fr/item/1093956874}
}
Smiley, Timothy. On Ł ukasiewicz's ${\rm \L}$-modal system.. Notre Dame J. Formal Logic, Tome 2 (1961) no. 1, pp. 149-153. http://gdmltest.u-ga.fr/item/1093956874/