@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/