@article{CMUC_1962_3_4_a1,
     author = {Trnkov\'a, V\v{e}ra},
     title = {{\CYRK} {\cyrt}{\cyre}{\cyro}{\cyrr}{\cyri}{\cyri} {\cyrk}{\cyra}{\cyrt}{\cyre}{\cyrg}{\cyro}{\cyrr}{\cyri}{\cyrishrt}},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {9--35},
     year = {1962},
     volume = {3},
     number = {4},
     mrnumber = {0146111},
     zbl = {0116.01501},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1962_3_4_a1/}
}