Certain iteration methods for the determination of periodic solutions of nonautonomous systems of differential equations
English version (Springer): Ukrainian Mathematical Journal 36 (1984), no. 3, pp 310-316.
Citation Example: Kenzhebaev K. K., Laptinskii V. N., Samoilenko A. M. Certain iteration methods for the determination of periodic solutions of nonautonomous systems of differential equations // Ukr. Mat. Zh. - 1984. - 36, № 3. - pp. 346 - 352.
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