@article{CMUC_1977__18_2_a1,
     author = {Potapov, Alexandr S. and Potapova, T. Ja. and Filin, V. A.},
     title = {{\CYRZ}a{\cyrm}e{\cyrch}a{\cyrn}{\cyri}{\cyrya}  {\cyro} {\cyrn}{\cyre}{\cyrp}{\cyro}{\cyrd}{\cyrv}{\cyri}{\cyrzh}{\cyrn}{\cyrery}{\cyrh} {\cyrt}{\cyro}{\cyrch}{\cyrk}{\cyra}x {\cyri} co{\cyrb}c{\cyrt}{\cyrv}e{\cyrn}{\cyrn}{\cyrery}x {\cyrv}e{\cyrk}{\cyrt}opax {\cyrp}o{\cyrl}o{\cyrzh}{\cyri}{\cyrt}e{\cyrl}{\cyrsftsn}{\cyrn}{\cyrery}x {\cyru}{\cyrp}{\cyrl}{\cyro}{\cyrt}{\cyrn}{\cyrya}{\cyryu}{\cyrshch}{\cyri}x o{\cyrp}{\cyre}{\cyrr}{\cyra}{\cyrt}{\cyro}{\cyrr}{\cyro}{\cyrv}},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {219--230},
     publisher = {mathdoc},
     volume = {18},
     number = {2},
     year = {1977},
     mrnumber = {0513070},
     zbl = {0399.47050},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1977__18_2_a1/}
}