@article{1183732545, author = {Lemmon, E. J.}, title = {Alternative Postulate Sets for Lewis's S5}, journal = {J. Symbolic Logic}, volume = {21}, number = {1}, year = {1956}, pages = { 347-349}, language = {en}, url = {http://dml.mathdoc.fr/item/1183732545} }
Lemmon, E. J. Alternative Postulate Sets for Lewis's S5. J. Symbolic Logic, Tome 21 (1956) no. 1, pp. 347-349. http://gdmltest.u-ga.fr/item/1183732545/