@article{VCHGU_1991_1_a4,
     author = {V. I. Ukhobotov},
     title = {{\CYRL}{\cyri}{\cyrn}{\cyre}{\cyrishrt}{\cyrn}{\cyra}{\cyrya} {\cyri}{\cyrg}{\cyrr}{\cyra} {\cyri}{\cyrm}{\cyrp}{\cyru}{\cyrl}{\cyrsftsn}{\cyrs}{\cyrn}{\cyro}{\cyrishrt} {\cyrv}{\cyrs}{\cyrt}{\cyrr}{\cyre}{\cyrch}{\cyri} {\cyrz}{\cyra}{\cyrd}{\cyra}{\cyrn}{\cyrn}{\cyro}{\cyrishrt} {\cyrp}{\cyrr}{\cyro}{\cyrd}{\cyro}{\cyrl}{\cyrzh}{\cyri}{\cyrt}{\cyre}{\cyrl}{\cyrsftsn}{\cyrn}{\cyro}{\cyrs}{\cyrt}{\cyri} {\cyrs} {\cyri}{\cyrn}{\cyrt}{\cyre}{\cyrg}{\cyrr}{\cyra}{\cyrl}{\cyrsftsn}{\cyrn}{\cyrery}{\cyrm} {\cyro}{\cyrg}{\cyrr}{\cyra}{\cyrn}{\cyri}{\cyrch}{\cyre}{\cyrn}{\cyri}{\cyre}{\cyrm}},
     journal = {Vestnik Chelyabinskogo Gosudarstvennogo Universiteta. Matematika, Mekhanika, Informatika},
     pages = {47--64},
     publisher = {mathdoc},
     number = {1},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VCHGU_1991_1_a4/}
}