@article{10_4153_CJM_1972_051_x,
     author = {Wiegand, Sylvia},
     title = {Galois {Theory} of {Essential} {Extensions} of {Modules}},
     journal = {Canadian journal of mathematics},
     pages = {573--579},
     year = {1972},
     volume = {24},
     number = {4},
     doi = {10.4153/CJM-1972-051-x},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1972-051-x/}
}