@article{MP_1936_1_7_a5,
     author = {B. V. Gnedenko},
     title = {{\CYRO} $\theta$ {\cyrv} {\cyrf}{\cyro}{\cyrr}{\cyrm}{\cyru}{\cyrl}{\cyre} {{\CYRL}{\cyra}{\cyrg}{\cyrr}{\cyra}{\cyrn}{\cyrzh}{\cyra}}},
     journal = {Matematicheskoe Prosveshchenie},
     pages = {31--35},
     year = {1936},
     volume = {Ser. 1, 7},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MP_1936_1_7_a5/}
}