@article{1093891611, author = {Scharle, Thomas W.}, title = {Axiomatization of fragments of ${\rm S}5$.}, journal = {Notre Dame J. Formal Logic}, volume = {16}, number = {1}, year = {1975}, pages = { 45-70}, language = {en}, url = {http://dml.mathdoc.fr/item/1093891611} }
Scharle, Thomas W. Axiomatization of fragments of ${\rm S}5$.. Notre Dame J. Formal Logic, Tome 16 (1975) no. 1, pp. 45-70. http://gdmltest.u-ga.fr/item/1093891611/