@article{10_4064_cm_8_2_225_231,
     author = {{\CYRB}. {\CYRG}{\cyrl}{\cyre}{\cyrishrt}{\cyrh}{\cyrg}{\cyre}{\cyrv}{\cyri}{\cyrh}{\cyrt}},
     title = {{\CYRN}{\cyre}{\cyrk}{\cyro}{\cyrt}{\cyro}{\cyrr}{\cyrery}{\cyre} {\cyrz}{\cyra}{\cyrm}{\cyre}{\cyrch}{\cyra}{\cyrn}{\cyri}{\cyrya} {\cyro} \ensuremath{\tau}-{\cyrk}{\cyro}{\cyrl}{\cyrsftsn}{\cyrc}{\cyra}{\cyrh}},
     journal = {Colloquium Mathematicum},
     pages = {225--231},
     publisher = {mathdoc},
     volume = {8},
     number = {2},
     year = {1961},
     doi = {10.4064/cm-8-2-225-231},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-8-2-225-231/}
}