@misc{MP_1960_2_5_a6,
     title = {{\CYRO}{\cyrt} {\cyrr}{\cyre}{\cyrd}{\cyra}{\cyrk}{\cyrc}{\cyri}{\cyri}},
     journal = {Matematicheskoe Prosveshchenie},
     pages = {117},
     year = {1960},
     volume = {Ser. 2, 5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MP_1960_2_5_a6/}
}