@article{MP_2021_3_27_a13,
     author = {A. A. Zaslavskii and A. I. Sgibnev},
     title = {{\CYRO}{\cyrd}{\cyrn}{\cyra} {\cyrz}{\cyra}{\cyrd}{\cyra}{\cyrch}{\cyra} {\cyro} {\cyrt}{\cyrr}{\cyre}{\cyru}{\cyrg}{\cyro}{\cyrl}{\cyrsftsn}{\cyrn}{\cyri}{\cyrk}{\cyra}{\cyrh}, {\cyrv}{\cyrp}{\cyri}{\cyrs}{\cyra}{\cyrn}{\cyrn}{\cyrery}{\cyrh} {\cyrv} {\cyrk}{\cyro}{\cyrn}{\cyri}{\cyrk}{\cyru}},
     journal = {Matematicheskoe Prosveshchenie},
     pages = {182--185},
     year = {2021},
     volume = {Ser. 3, 27},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MP_2021_3_27_a13/}
}