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@article{MM2_1989__64_2_155410, author = {C. Greither}, title = {Unramified {Kummer} extensions of prime power degree.}, journal = {Manuscripta mathematica}, pages = {261--290}, publisher = {mathdoc}, volume = {64}, number = {2}, year = {1989}, zbl = {0705.13004}, url = {http://geodesic.mathdoc.fr/item/MM2_1989__64_2_155410/} }
C. Greither. Unramified Kummer extensions of prime power degree.. Manuscripta mathematica, Tome 64 (1989) no. 2, pp. 261-290. http://geodesic.mathdoc.fr/item/MM2_1989__64_2_155410/