%0 Journal Article %A E. Muhamadiev %A A. N. Naimov %T On a priori estimate of periodic solutions of a system of nonlinear ordinary differential equations of the second order %J Izvestiâ vysših učebnyh zavedenij. Matematika %D 2024 %P 45-54 %N 8 %U http://geodesic.mathdoc.fr/item/IVM_2024_8_a4/ %G ru %F IVM_2024_8_a4