@misc{KVANT_2021_4_a7,
     title = {{\CYRZ}{\cyra}{\cyrd}{\cyra}{\cyrch}{\cyri}},
     journal = {Kvant},
     pages = {25},
     year = {2021},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/KVANT_2021_4_a7/}
}