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@article{DAN_1961_136_3_a5, author = {V. P. Il'in and V. A. Solonnikov}, title = {Some properties of differentiable functions of many variables}, journal = {Doklady Akademii Nauk}, pages = {538--541}, publisher = {mathdoc}, volume = {136}, number = {3}, year = {1961}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1961_136_3_a5/} }
V. P. Il'in; V. A. Solonnikov. Some properties of differentiable functions of many variables. Doklady Akademii Nauk, Tome 136 (1961) no. 3, pp. 538-541. http://geodesic.mathdoc.fr/item/DAN_1961_136_3_a5/