@article{KVANT_2020_5_a2,
     author = {E. Smirnov},
     title = {{\CYRCH}{\cyri}{\cyrs}{\cyrl}{\cyro}{\cyrv}{\cyrery}{\cyre} {\cyrf}{\cyrr}{\cyri}{\cyrz}{\cyrery}},
     journal = {Kvant},
     pages = {15--24},
     publisher = {mathdoc},
     number = {5},
     year = {2020},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/KVANT_2020_5_a2/}
}