@article{VCHGU_1994_2_a11,
     author = {A. I. Povolotskii and A. S. Kalitvin},
     title = {{\CYRR}{\cyra}{\cyrz}{\cyrr}{\cyre}{\cyrsh}{\cyri}{\cyrm}{\cyro}{\cyrs}{\cyrt}{\cyrsftsn} {\cyru}{\cyrr}{\cyra}{\cyrv}{\cyrn}{\cyre}{\cyrn}{\cyri}{\cyrishrt} {{\CYRU}{\cyrr}{\cyrery}{\cyrs}{\cyro}{\cyrn}{\cyra}} {\cyrs} {\cyrch}{\cyra}{\cyrs}{\cyrt}{\cyrn}{\cyrery}{\cyrm}{\cyri} {\cyri}{\cyrn}{\cyrt}{\cyre}{\cyrg}{\cyrr}{\cyra}{\cyrl}{\cyra}{\cyrm}{\cyri}},
     journal = {Vestnik Chelyabinskogo Gosudarstvennogo Universiteta. Matematika, Mekhanika, Informatika},
     pages = {96--102},
     publisher = {mathdoc},
     number = {2},
     year = {1994},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VCHGU_1994_2_a11/}
}