@article{1093891406, author = {Goble, Louis F.}, title = {Gentzen systems for modal logic.}, journal = {Notre Dame J. Formal Logic}, volume = {15}, number = {1}, year = {1974}, pages = { 455-461}, language = {en}, url = {http://dml.mathdoc.fr/item/1093891406} }
Goble, Louis F. Gentzen systems for modal logic.. Notre Dame J. Formal Logic, Tome 15 (1974) no. 1, pp. 455-461. http://gdmltest.u-ga.fr/item/1093891406/