@article{MP_1958_2_3_a21,
     author = {I. I. Ogievetskii},
     title = {{\CYRD}{\cyrn}{\cyre}{\cyrp}{\cyrr}{\cyro}{\cyrp}{\cyre}{\cyrt}{\cyrr}{\cyro}{\cyrv}{\cyrs}{\cyrk}},
     journal = {Matematicheskoe Prosveshchenie},
     pages = {238--240},
     year = {1958},
     volume = {Ser. 2, 3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MP_1958_2_3_a21/}
}