@article{1093958338, author = {Lemmon, E. J.}, title = {Some results on finite axiomatizability in modal logic.}, journal = {Notre Dame J. Formal Logic}, volume = {6}, number = {1}, year = {1965}, pages = { 301-308}, language = {en}, url = {http://dml.mathdoc.fr/item/1093958338} }
Lemmon, E. J. Some results on finite axiomatizability in modal logic.. Notre Dame J. Formal Logic, Tome 6 (1965) no. 1, pp. 301-308. http://gdmltest.u-ga.fr/item/1093958338/