@article{1102906595, author = {Osterburg, James}, title = {Completely outer Galois theory of perfect rings.}, journal = {Pacific J. Math.}, volume = {61}, number = {2}, year = {1975}, pages = { 215-220}, language = {en}, url = {http://dml.mathdoc.fr/item/1102906595} }
Osterburg, James. Completely outer Galois theory of perfect rings.. Pacific J. Math., Tome 61 (1975) no. 2, pp. 215-220. http://gdmltest.u-ga.fr/item/1102906595/