@misc{KVANT_2021_9_a6,
     title = {{\CYRZ}{\cyra}{\cyrd}{\cyra}{\cyrch}{\cyri}},
     journal = {Kvant},
     pages = {23},
     year = {2021},
     number = {9},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/KVANT_2021_9_a6/}
}