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@article{MZM_1978_23_3_a10, author = {N. V. Grigorenko}, title = {$G$-primitive extensions of differential fields}, journal = {Matemati\v{c}eskie zametki}, pages = {425--434}, publisher = {mathdoc}, volume = {23}, number = {3}, year = {1978}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1978_23_3_a10/} }
N. V. Grigorenko. $G$-primitive extensions of differential fields. Matematičeskie zametki, Tome 23 (1978) no. 3, pp. 425-434. http://geodesic.mathdoc.fr/item/MZM_1978_23_3_a10/