@article{10_21136_CMJ_1956_100214,
     author = {Sitnikov, Kirill Aleksandrovich},
     title = {{\CYRK}{\cyro}{\cyrm}{\cyrb}{\cyri}{\cyrn}{\cyra}{\cyrt}{\cyro}{\cyrr}{\cyrn}{\cyra}{\cyrya} {\cyrt}{\cyro}{\cyrp}{\cyro}{\cyrl}{\cyro}{\cyrg}{\cyri}{\cyrya} {\cyrn}{\cyre}{\cyrz}{\cyra}{\cyrm}{\cyrk}{\cyrn}{\cyru}{\cyrt}{\cyrery}{\cyrh} {\cyrm}{\cyrn}{\cyro}{\cyrzh}{\cyre}{\cyrs}{\cyrt}{\cyrv}},
     journal = {Czechoslovak Mathematical Journal},
     pages = {444--449},
     publisher = {mathdoc},
     volume = {06},
     number = {4},
     year = {1956},
     doi = {10.21136/CMJ.1956.100214},
     mrnumber = {0123311},
     zbl = {0075.18001},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1956.100214/}
}