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@article{DAN_1966_167_4_a7, author = {T. Sabirov}, title = {The question of stability of small periodic solutions}, journal = {Doklady Akademii Nauk}, pages = {755--757}, publisher = {mathdoc}, volume = {167}, number = {4}, year = {1966}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1966_167_4_a7/} }
T. Sabirov. The question of stability of small periodic solutions. Doklady Akademii Nauk, Tome 167 (1966) no. 4, pp. 755-757. http://geodesic.mathdoc.fr/item/DAN_1966_167_4_a7/