@misc{MP_1960_a31,
     title = {{\CYRZ}{\cyra}{\cyrd}{\cyra}{\cyrch}{\cyri}},
     journal = {Matematicheskoe Prosveshchenie},
     pages = {253--260},
     publisher = {mathdoc},
     year = {1960},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MP_1960_a31/}
}