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@article{MAN_1975__216_162724, author = {W.H. Schikhof}, title = {The {Set} of {Derivatives} in a {Non-Archimedean} {Field.}}, journal = {Mathematische Annalen}, pages = {67--70}, publisher = {mathdoc}, volume = {216}, year = {1975}, zbl = {0308.12102}, url = {http://geodesic.mathdoc.fr/item/MAN_1975__216_162724/} }
W.H. Schikhof. The Set of Derivatives in a Non-Archimedean Field.. Mathematische Annalen, Tome 216 (1975), pp. 67-70. http://geodesic.mathdoc.fr/item/MAN_1975__216_162724/