@article{IVM_2024_8_a4,
     author = {E. Muhamadiev and A. N. Naimov},
     title = {On a priori estimate of periodic solutions of a system of nonlinear ordinary differential equations of the second order},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {45--54},
     year = {2024},
     number = {8},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2024_8_a4/}
}