%0 Journal Article %A A. N. Naimov %A M. M. Kobilzoda %T On the solvability of a periodic problem for nonlinear ordinary differential equation of the second order %J Izvestiâ vysših učebnyh zavedenij. Matematika %D 2021 %P 56-65 %N 8 %I mathdoc %U http://geodesic.mathdoc.fr/item/IVM_2021_8_a5/ %G ru %F IVM_2021_8_a5