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@article{AM2_1981__22_136873, author = {Robert P. Infante}, title = {On the {Galois} theory of difference fields.}, journal = {Aequationes mathematicae}, pages = {194--207}, publisher = {mathdoc}, volume = {22}, year = {1981}, zbl = {0483.12005}, url = {http://geodesic.mathdoc.fr/item/AM2_1981__22_136873/} }
Robert P. Infante. On the Galois theory of difference fields.. Aequationes mathematicae, Tome 22 (1981), pp. 194-207. http://geodesic.mathdoc.fr/item/AM2_1981__22_136873/