@article{KVANT_2021_1_a1,
     author = {V. Protasov},
     title = {{\CYRK}{\cyrr}{\cyra}{\cyrt}{\cyrch}{\cyra}{\cyrishrt}{\cyrsh}{\cyri}{\cyre} {\cyrp}{\cyru}{\cyrt}{\cyri} {\cyri} {\cyrg}{\cyri}{\cyrp}{\cyro}{\cyrt}{\cyre}{\cyrz}{\cyra} {{\CYRP}{\cyru}{\cyra}{\cyrn}{\cyrk}{\cyra}{\cyrr}{\cyre}}},
     journal = {Kvant},
     pages = {12--22},
     publisher = {mathdoc},
     number = {1},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/KVANT_2021_1_a1/}
}