%0 Journal Article %A Wiegand, Sylvia %T Galois Theory of Essential Extensions of Modules %J Canadian journal of mathematics %D 1972 %P 573-579 %V 24 %N 4 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1972-051-x/ %R 10.4153/CJM-1972-051-x %F 10_4153_CJM_1972_051_x