@misc{MP_1937_1_12_a13,
     title = {{\CYRO}{\cyrb}{\cyrz}{\cyro}{\cyrr} {\cyrp}{\cyre}{\cyrch}{\cyra}{\cyrt}{\cyri}},
     journal = {Matematicheskoe Prosveshchenie},
     pages = {55--58},
     year = {1937},
     volume = {Ser. 1, 12},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MP_1937_1_12_a13/}
}