@article{MP_1960_a29,
     author = {N. V. Efimov},
     title = {{\CYRN}.\,{\CYRV}.~{\CYRE}{\cyrf}{\cyri}{\cyrm}{\cyro}{\cyrv}--{\CYRE}.~{\CYRG}{\cyre}{\cyrishrt}{\cyrn}{\cyrc}. {{\CYRI}{\cyrs}{\cyrs}{\cyrl}{\cyre}{\cyrd}{\cyro}{\cyrv}{\cyra}{\cyrn}{\cyri}{\cyrya}} {\cyrv}{\cyro}{\cyrz}{\cyrm}{\cyro}{\cyrzh}{\cyrn}{\cyro}{\cyrs}{\cyrt}{\cyri} {\cyrv}{\cyrl}{\cyro}{\cyrzh}{\cyre}{\cyrn}{\cyri}{\cyrya} {\cyrp}{\cyro}{\cyrv}{\cyre}{\cyrr}{\cyrh}{\cyrn}{\cyro}{\cyrs}{\cyrt}{\cyre}{\cyrishrt} {\cyro}{\cyrt}{\cyrr}{\cyri}{\cyrc}{\cyra}{\cyrt}{\cyre}{\cyrl}{\cyrsftsn}{\cyrn}{\cyro}{\cyrishrt} {\cyrk}{\cyrr}{\cyri}{\cyrv}{\cyri}{\cyrz}{\cyrn}{\cyrery} {\cyrv}~{\cyrt}{\cyrr}{\cyre}{\cyrh}{\cyrm}{\cyre}{\cyrr}{\cyrn}{\cyro}{\cyre} {\cyrp}{\cyrr}{\cyro}{\cyrs}{\cyrt}{\cyrr}{\cyra}{\cyrn}{\cyrs}{\cyrt}{\cyrv}{\cyro}},
     journal = {Matematicheskoe Prosveshchenie},
     pages = {243--246},
     publisher = {mathdoc},
     year = {1960},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MP_1960_a29/}
}