@article{AM2_1981__22_136862,
     author = {Robert P. Infante},
     title = {On the {Galois} theory of difference fields. {(Short} {Communication).}},
     journal = {Aequationes mathematicae},
     pages = {112--113},
     publisher = {mathdoc},
     volume = {22},
     year = {1981},
     url = {http://geodesic.mathdoc.fr/item/AM2_1981__22_136862/}
}