Voir la notice de l'article provenant de la source Math-Net.Ru
@article{TRSPY_1971_112_a20, author = {S. M. Nikol'skii}, title = {The preservation of class under a differentiable mapping}, journal = {Informatics and Automation}, pages = {327--336}, publisher = {mathdoc}, volume = {112}, year = {1971}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/TRSPY_1971_112_a20/} }
S. M. Nikol'skii. The preservation of class under a differentiable mapping. Informatics and Automation, Collection of articles. Part I, Tome 112 (1971), pp. 327-336. http://geodesic.mathdoc.fr/item/TRSPY_1971_112_a20/