Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1964_155_2_a3, author = {L. D. Ivanov}, title = {Smooth mappings of the space $R_n$ into $R_1$}, journal = {Doklady Akademii Nauk}, pages = {258--261}, publisher = {mathdoc}, volume = {155}, number = {2}, year = {1964}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1964_155_2_a3/} }
L. D. Ivanov. Smooth mappings of the space $R_n$ into $R_1$. Doklady Akademii Nauk, Tome 155 (1964) no. 2, pp. 258-261. http://geodesic.mathdoc.fr/item/DAN_1964_155_2_a3/