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@article{DAN_1968_181_4_a9, author = {T. Sabirov}, title = {The stability of small periodic solutions at multidimensional degeneracies}, journal = {Doklady Akademii Nauk}, pages = {805--807}, publisher = {mathdoc}, volume = {181}, number = {4}, year = {1968}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1968_181_4_a9/} }
T. Sabirov. The stability of small periodic solutions at multidimensional degeneracies. Doklady Akademii Nauk, Tome 181 (1968) no. 4, pp. 805-807. http://geodesic.mathdoc.fr/item/DAN_1968_181_4_a9/