@article{1200689632, author = {Ohnishi, Masao and Matsumoto, Kazuo}, title = {Gentzen method in modal calculi. II}, journal = {Osaka Math. J.}, volume = {11}, number = {1}, year = {1959}, pages = { 115-120}, language = {en}, url = {http://dml.mathdoc.fr/item/1200689632} }
Ohnishi, Masao; Matsumoto, Kazuo. Gentzen method in modal calculi. II. Osaka Math. J., Tome 11 (1959) no. 1, pp. 115-120. http://gdmltest.u-ga.fr/item/1200689632/