@article{MP_1957_2_1_a5,
     author = {E. M. Landis},
     title = {{\CYRO} {\cyrd}{\cyrl}{\cyri}{\cyrn}{\cyre} {\cyrk}{\cyrr}{\cyri}{\cyrv}{\cyro}{\cyrishrt}},
     journal = {Matematicheskoe Prosveshchenie},
     pages = {33--44},
     year = {1957},
     volume = {Ser. 2, 1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MP_1957_2_1_a5/}
}