@article{10_21136_CMJ_1954_100124,
     author = {Ji\v{r}ina, Miloslav},
     title = {{\CYRU}{\cyrs}{\cyrl}{\cyro}{\cyrv}{\cyrn}{\cyrery}{\cyre} {\cyrv}{\cyre}{\cyrr}{\cyro}{\cyrya}{\cyrt}{\cyrn}{\cyro}{\cyrs}{\cyrt}{\cyri} {\cyrn}{\cyra} $\sigma$-{\cyra}{\cyrl}{\cyrg}{\cyre}{\cyrb}{\cyrr}{\cyra}{\cyrh} {\cyrs}{\cyro} {\cyrs}{\cyrch}{\cyre}{\cyrt}{\cyrn}{\cyrery}{\cyrm} {\cyrb}{\cyra}{\cyrz}{\cyri}{\cyrs}{\cyro}{\cyrm}},
     journal = {Czechoslovak Mathematical Journal},
     pages = {372--380},
     publisher = {mathdoc},
     volume = {04},
     number = {4},
     year = {1954},
     doi = {10.21136/CMJ.1954.100124},
     mrnumber = {0069416},
     zbl = {0058.11801},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1954.100124/}
}