Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1976_231_4_a14, author = {V. V. Beletskii and A. N. Shlyakhtin}, title = {Extremum properties of resonance motions}, journal = {Doklady Akademii Nauk}, pages = {829--832}, publisher = {mathdoc}, volume = {231}, number = {4}, year = {1976}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1976_231_4_a14/} }
V. V. Beletskii; A. N. Shlyakhtin. Extremum properties of resonance motions. Doklady Akademii Nauk, Tome 231 (1976) no. 4, pp. 829-832. http://geodesic.mathdoc.fr/item/DAN_1976_231_4_a14/