Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1990_314_1_a16, author = {N. D. Kopachevskii}, title = {Inversion of {Lagrange's} theorem on the stability of small}, journal = {Doklady Akademii Nauk}, pages = {71--73}, publisher = {mathdoc}, volume = {314}, number = {1}, year = {1990}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1990_314_1_a16/} }
N. D. Kopachevskii. Inversion of Lagrange's theorem on the stability of small. Doklady Akademii Nauk, Tome 314 (1990) no. 1, pp. 71-73. http://geodesic.mathdoc.fr/item/DAN_1990_314_1_a16/