@article{MP_2020_3_25_a7,
     author = {G. A. Merzon},
     title = {{\CYRC}{\cyre}{\cyrl}{\cyrery}{\cyre} {\cyrt}{\cyro}{\cyrch}{\cyrk}{\cyri}},
     journal = {Matematicheskoe Prosveshchenie},
     pages = {110--122},
     year = {2020},
     volume = {Ser. 3, 25},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MP_2020_3_25_a7/}
}