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@article{CM_1995__97_1-2_227_0, author = {Van der Put, Marius}, title = {Differential equations in characteristic $p$}, journal = {Compositio Mathematica}, pages = {227--251}, publisher = {Kluwer Academic Publishers}, volume = {97}, number = {1-2}, year = {1995}, mrnumber = {1355126}, zbl = {0861.12004}, language = {en}, url = {http://geodesic.mathdoc.fr/item/CM_1995__97_1-2_227_0/} }
Van der Put, Marius. Differential equations in characteristic $p$. Compositio Mathematica, Tome 97 (1995) no. 1-2, pp. 227-251. http://geodesic.mathdoc.fr/item/CM_1995__97_1-2_227_0/