@article{1183383695,
author = {Fitch, Frederic B.},
title = {Modal Functions in Two-Valued Logic},
journal = {J. Symbolic Logic},
volume = {2},
number = {2},
year = {1937},
pages = { 125-128},
language = {en},
url = {http://dml.mathdoc.fr/item/1183383695}
}
Fitch, Frederic B. Modal Functions in Two-Valued Logic. J. Symbolic Logic, Tome 2 (1937) no. 2, pp. 125-128. http://gdmltest.u-ga.fr/item/1183383695/