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@article{JRAM_1972__252_151187, author = {Masatoshi Ikeda}, title = {A generalization of the {Hasse-Arf} theorem.}, journal = {Journal f\"ur die reine und angewandte Mathematik}, pages = {183--186}, publisher = {mathdoc}, volume = {252}, year = {1972}, zbl = {0237.12009}, url = {http://geodesic.mathdoc.fr/item/JRAM_1972__252_151187/} }
Masatoshi Ikeda. A generalization of the Hasse-Arf theorem.. Journal für die reine und angewandte Mathematik, Tome 252 (1972), pp. 183-186. http://geodesic.mathdoc.fr/item/JRAM_1972__252_151187/