@article{1183740511, author = {Sato, Masahiko}, title = {A Cut-Free Gentzen-Type System for the Modal Logic S5}, journal = {J. Symbolic Logic}, volume = {45}, number = {1}, year = {1980}, pages = { 67-84}, language = {en}, url = {http://dml.mathdoc.fr/item/1183740511} }
Sato, Masahiko. A Cut-Free Gentzen-Type System for the Modal Logic S5. J. Symbolic Logic, Tome 45 (1980) no. 1, pp. 67-84. http://gdmltest.u-ga.fr/item/1183740511/