@article{KVANT_2021_11_a6,
     author = {O. Ptushenko and V. Ptushenko},
     title = {{\CYRK}{\cyra}{\cyrp}{\cyrl}{\cyri} {\cyrt}{\cyru}{\cyrm}{\cyra}{\cyrn}{\cyra} {\cyrv} {\cyrl}{\cyru}{\cyrch}{\cyre} {\cyrs}{\cyrv}{\cyre}{\cyrt}{\cyra}},
     journal = {Kvant},
     pages = {29--30},
     publisher = {mathdoc},
     number = {11},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/KVANT_2021_11_a6/}
}