@article{MS_1957__84_4_a1,
     author = {{\CYRR}.{\CYRI}. {\CYRT}{\cyrery}{\cyrsh}{\cyrk}{\cyre}{\cyrv}{\cyri}{\cyrch}},
     title = {{\CYRO} {\cyrn}{\cyri}{\cyrl}{\cyrsftsn}{\cyrp}{\cyro}{\cyrt}{\cyre}{\cyrn}{\cyrt}{\cyrn}{\cyrery}{\cyrh} {\cyrl}{\cyri}{\cyrn}{\cyre}{\cyrishrt}{\cyrn}{\cyrery}{\cyrh} {\cyrg}{\cyrr}{\cyru}{\cyrp}{\cyrp}{\cyra}{\cyrh}},
     journal = {Matemati\v{c}eskij sbornik},
     pages = {441--444},
     publisher = {mathdoc},
     volume = {84},
     number = {4},
     year = {1957},
     zbl = {0223.20049},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MS_1957__84_4_a1/}
}