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@article{IVM_1963_5_a15, author = {V. S. Serebryakova}, title = {A bound for the domain of existence of periodic solutions}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {105--112}, publisher = {mathdoc}, number = {5}, year = {1963}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1963_5_a15/} }
V. S. Serebryakova. A bound for the domain of existence of periodic solutions. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 5 (1963), pp. 105-112. http://geodesic.mathdoc.fr/item/IVM_1963_5_a15/