@article{GDZPPN002186551,
title = {A generalization of the Hasse-Arf theorem.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {253},
year = {1972},
pages = {183-186},
zbl = {0237.12009},
url = {http://dml.mathdoc.fr/item/GDZPPN002186551}
}
Ikeda, Masatoshi. A generalization of the Hasse-Arf theorem.. Journal für die reine und angewandte Mathematik, Tome 253 (1972) pp. 183-186. http://gdmltest.u-ga.fr/item/GDZPPN002186551/