@article{MP_2020_a13,
     author = {A. S. Milevskii},
     title = {{\CYRO} {\cyrz}{\cyra}{\cyrd}{\cyra}{\cyrch}{\cyre} 22.1},
     journal = {Matematicheskoe Prosveshchenie},
     pages = {263--264},
     publisher = {mathdoc},
     year = {2020},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MP_2020_a13/}
}