@article{CHEB_2021_22_5_a26,
     author = {M. N. Dobrovol'skii and N. N. Dobrovol'skii and N. M. Dobrovol'skii},
     title = {About one functional equation},
     journal = {\v{C}eby\v{s}evskij sbornik},
     pages = {359--364},
     publisher = {mathdoc},
     volume = {22},
     number = {5},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/CHEB_2021_22_5_a26/}
}