Voir la notice de l'article provenant de la source Math-Net.Ru
@article{IVM_1970_11_a2, author = {V. I. Gracheva}, title = {Certain cases of differentiable mappings of {Euclidean} spaces}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {22--30}, publisher = {mathdoc}, number = {11}, year = {1970}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1970_11_a2/} }
V. I. Gracheva. Certain cases of differentiable mappings of Euclidean spaces. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 11 (1970), pp. 22-30. http://geodesic.mathdoc.fr/item/IVM_1970_11_a2/