@article{10_21136_CMJ_1962_100515,
     author = {Ne\v{c}as, Jind\v{r}ich},
     title = {{\CYRO}{\cyrb} {\cyro}{\cyrb}{\cyrl}{\cyra}{\cyrs}{\cyrt}{\cyrya}{\cyrh} {\cyrt}{\cyri}{\cyrp}{\cyra} ${\frak N}$},
     journal = {Czechoslovak Mathematical Journal},
     pages = {274--287},
     year = {1962},
     volume = {12},
     number = {2},
     doi = {10.21136/CMJ.1962.100515},
     mrnumber = {0152734},
     zbl = {0106.27001},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1962.100515/}
}