@article{MZM_1978_23_2_a15,
     author = {G. I. Ivchenko and V. A. Ivanov},
     title = {{\CYRO}~{\cyrn}{\cyre}{\cyrk}{\cyro}{\cyrt}{\cyro}{\cyrr}{\cyrery}{\cyrh} {\cyrg}{\cyrr}{\cyra}{\cyrn}{\cyri}{\cyrch}{\cyrn}{\cyrery}{\cyrh} {\cyrf}{\cyru}{\cyrn}{\cyrk}{\cyrc}{\cyri}{\cyro}{\cyrn}{\cyra}{\cyrl}{\cyra}{\cyrh} {\cyrd}{\cyrl}{\cyrya} {\cyrm}{\cyra}{\cyrr}{\cyrk}{\cyro}{\cyrv}{\cyrs}{\cyrk}{\cyri}{\cyrh} {\cyrb}{\cyrl}{\cyru}{\cyrzh}{\cyrd}{\cyra}{\cyrn}{\cyri}{\cyrishrt}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {315--326},
     publisher = {mathdoc},
     volume = {23},
     number = {2},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1978_23_2_a15/}
}