@article{GDZPPN002229889,
title = {Unramified Kummer extensions of prime power degree.},
journal = {Manuscripta mathematica},
volume = {64},
year = {1989},
pages = {261-290},
zbl = {0705.13004},
url = {http://dml.mathdoc.fr/item/GDZPPN002229889}
}
Greither, C. Unramified Kummer extensions of prime power degree.. Manuscripta mathematica, Tome 64 (1989) pp. 261-290. http://gdmltest.u-ga.fr/item/GDZPPN002229889/