@article{1183730670, author = {Hoo, Tzu-Hua}, title = {$m$-Valued Sub-System of $(m+n)$-Valued Propositional Calculus}, journal = {J. Symbolic Logic}, volume = {14}, number = {1}, year = {1949}, pages = { 177-181}, language = {en}, url = {http://dml.mathdoc.fr/item/1183730670} }
Hoo, Tzu-Hua. $m$-Valued Sub-System of $(m+n)$-Valued Propositional Calculus. J. Symbolic Logic, Tome 14 (1949) no. 1, pp. 177-181. http://gdmltest.u-ga.fr/item/1183730670/