@article{KVANT_2020_1_a13,
     author = {A. Savin},
     title = {{\CYRP}{\cyrr}{\cyro} {\cyru}{\cyrm}{\cyrn}{\cyro}{\cyrzh}{\cyre}{\cyrn}{\cyri}{\cyre}},
     journal = {Kvant},
     pages = {47--50},
     publisher = {mathdoc},
     number = {1},
     year = {2020},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/KVANT_2020_1_a13/}
}