@article{1094068850, author = {Thomas, Ivo}, title = {Decision for $K4$.}, journal = {Notre Dame J. Formal Logic}, volume = {8}, number = {3}, year = {1967}, pages = { 337-338}, language = {en}, url = {http://dml.mathdoc.fr/item/1094068850} }
Thomas, Ivo. Decision for $K4$.. Notre Dame J. Formal Logic, Tome 8 (1967) no. 3, pp. 337-338. http://gdmltest.u-ga.fr/item/1094068850/