@article{INTO_2024_235_a7,
     author = {A. N. Naimov and M. V. Bystretskii},
     title = {Investigation of periodic solutions of a two-dimensional system of nonlinear ordinary second-order differential equations},
     journal = {Itogi nauki i tehniki. Sovremenna\^a matematika i e\"e prilo\v{z}eni\^a. Temati\v{c}eskie obzory},
     pages = {87--96},
     publisher = {mathdoc},
     volume = {235},
     year = {2024},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/INTO_2024_235_a7/}
}