@article{10_21136_CMJ_1984_101921,
     author = {Medvedev, N.Ya.},
     title = {{\CYRO} {\cyrr}{\cyre}{\cyrsh}{\cyryo}{\cyrt}{\cyrk}{\cyre} $o$-{\cyra}{\cyrp}{\cyrp}{\cyrr}{\cyro}{\cyrk}{\cyrs}{\cyri}{\cyrm}{\cyri}{\cyrr}{\cyru}{\cyre}{\cyrm}{\cyrery}{\cyrh} $\ell$-{\cyrm}{\cyrn}{\cyro}{\cyrg}{\cyro}{\cyro}{\cyrb}{\cyrr}{\cyra}{\cyrz}{\cyri}{\cyrishrt}},
     journal = {Czechoslovak Mathematical Journal},
     pages = {6--17},
     publisher = {mathdoc},
     volume = {34},
     number = {1},
     year = {1984},
     doi = {10.21136/CMJ.1984.101921},
     mrnumber = {731975},
     zbl = {0551.06017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1984.101921/}
}