@article{VCHGU_1991_1_a22,
     author = {T. A. Butko and G. A. Sviridyuk},
     title = {{\CYRO}{\cyrb} {\cyro}{\cyrd}{\cyrn}{\cyro}{\cyrishrt} {\cyrg}{\cyri}{\cyrp}{\cyro}{\cyrt}{\cyre}{\cyrz}{\cyre} {\cyrv} {\cyrt}{\cyre}{\cyro}{\cyrr}{\cyri}{\cyri} {\cyrp}{\cyro}{\cyrl}{\cyru}{\cyrl}{\cyri}{\cyrn}{\cyre}{\cyrishrt}{\cyrn}{\cyrery}{\cyrh} {\cyru}{\cyrr}{\cyra}{\cyrv}{\cyrn}{\cyre}{\cyrn}{\cyri}{\cyrishrt} {\cyrt}{\cyri}{\cyrp}{\cyra} {{\CYRS}{\cyro}{\cyrb}{\cyro}{\cyrl}{\cyre}{\cyrv}{\cyra}}},
     journal = {Vestnik Chelyabinskogo Gosudarstvennogo Universiteta. Matematika, Mekhanika, Informatika},
     pages = {144--145},
     publisher = {mathdoc},
     number = {1},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VCHGU_1991_1_a22/}
}