@article{MP_1935_1_4_a12,
     author = {N. A. Izvolskii},
     title = {{\CYRO} {\cyrf}{\cyro}{\cyrr}{\cyrm}{\cyru}{\cyrl}{\cyre} {{\CYRK}{\cyra}{\cyrr}{\cyrd}{\cyra}{\cyrn}{\cyra}}},
     journal = {Matematicheskoe Prosveshchenie},
     pages = {86--88},
     year = {1935},
     volume = {Ser. 1, 4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MP_1935_1_4_a12/}
}