@article{MP_2021_a18, author = {A. Ya. Kanel-Belov and I. V. Mitrofanov}, title = {{\CYRD}{\cyro}{\cyrp}{\cyro}{\cyrl}{\cyrn}{\cyre}{\cyrn}{\cyri}{\cyre} {\cyrk} {\cyrz}{\cyra}{\cyrd}{\cyra}{\cyrch}{\cyrn}{\cyri}{\cyrk}{\cyru}}, journal = {Matematicheskoe Prosveshchenie}, pages = {237--248}, publisher = {mathdoc}, year = {2021}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MP_2021_a18/} }