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@article{JRAM_1997__484_153898, author = {Bernard M. Dwork}, title = {On exponents of p-adic differential modules.}, journal = {Journal f\"ur die reine und angewandte Mathematik}, pages = {85--126}, publisher = {mathdoc}, volume = {484}, year = {1997}, zbl = {0870.12008}, url = {http://geodesic.mathdoc.fr/item/JRAM_1997__484_153898/} }
Bernard M. Dwork. On exponents of p-adic differential modules.. Journal für die reine und angewandte Mathematik, Tome 484 (1997), pp. 85-126. http://geodesic.mathdoc.fr/item/JRAM_1997__484_153898/