@article{MS_1968__117_2_a1,
     author = {{\CYRL}.{\CYRN}. {\CYRV}{\cyra}{\cyrs}{\cyre}{\cyrr}{\cyrsh}{\cyrt}{\cyre}{\cyrishrt}{\cyrn}},
     title = {{\CYRP}{\cyro}{\cyrd}{\cyrg}{\cyrr}{\cyru}{\cyrp}{\cyrp}{\cyrery} {\cyrk}{\cyro}{\cyrn}{\cyre}{\cyrch}{\cyrn}{\cyro}{\cyrg}{\cyro} {\cyri}{\cyrn}{\cyrd}{\cyre}{\cyrk}{\cyrs}{\cyra} {\cyrs}{\cyrp}{\cyri}{\cyrn}{\cyro}{\cyrr}{\cyrn}{\cyro}{\cyrishrt} {\cyrg}{\cyrr}{\cyru}{\cyrp}{\cyrp}{\cyrery} {\cyrr}{\cyra}{\cyrn}{\cyrg}{\cyra}, {\cyrb}{\cyro}{\cyrl}{\cyrsftsn}{\cyrsh}{\cyre}{\cyrg}{\cyro} {\cyri}{\cyrl}{\cyri} {\cyrr}{\cyra}{\cyrv}{\cyrn}{\cyro}{\cyrg}{\cyro} 2},
     journal = {Matemati\v{c}eskij sbornik},
     pages = {178--184},
     publisher = {mathdoc},
     volume = {117},
     number = {2},
     year = {1968},
     zbl = {0247.20050},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MS_1968__117_2_a1/}
}