@article{KVANT_2019_6_a18,
     author = {E. Epifanov},
     title = {{\CYRB}{\cyru}{\cyrk}{\cyrv}{\cyra}~{\CYRN}},
     journal = {Kvant},
     pages = {1},
     publisher = {mathdoc},
     number = {6},
     year = {2019},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/KVANT_2019_6_a18/}
}