@article{KVANT_2022_2_a2,
     author = {L. Belopukhov},
     title = {{\CYRN}{\cyro}{\cyrb}{\cyre}{\cyrl}{\cyri}{\cyra}{\cyrd}{\cyra}-21},
     journal = {Kvant},
     pages = {22--27},
     publisher = {mathdoc},
     number = {2},
     year = {2022},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/KVANT_2022_2_a2/}
}