@article{MP_1960_a11,
     author = {V. I. Levin},
     title = {{\CYRO}{\cyrb} {\cyro}{\cyrd}{\cyrn}{\cyro}{\cyrm} {\cyrf}{\cyru}{\cyrn}{\cyrk}{\cyrc}{\cyri}{\cyro}{\cyrn}{\cyra}{\cyrl}{\cyrsftsn}{\cyrn}{\cyro}{\cyrm} {\cyru}{\cyrr}{\cyra}{\cyrv}{\cyrn}{\cyre}{\cyrn}{\cyri}{\cyri}},
     journal = {Matematicheskoe Prosveshchenie},
     pages = {149--151},
     publisher = {mathdoc},
     year = {1960},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MP_1960_a11/}
}