@article{KVANT_2020_8_a5,
     author = {S. Novikov},
     title = {{\CYRZ}{\cyra}{\cyrg}{\cyra}{\cyrd}{\cyro}{\cyrch}{\cyrn}{\cyrery}{\cyre}
},
     journal = {Kvant},
     pages = {44--47},
     publisher = {mathdoc},
     number = {8},
     year = {2020},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/KVANT_2020_8_a5/}
}