@article{MI_1989__106_190049,
     author = {{\CYRV}.{\CYRI}. {\CYRG}{\cyru}{\cyrc}{\cyru}},
     title = {{\CYRP}{\cyre}{\cyrr}{\cyri}{\cyro}{\cyrd}{\cyri}{\cyrch}{\cyre}{\cyrs}{\cyrk}{\cyri}{\cyre} {\cyrr}{\cyre}{\cyrsh}{\cyre}{\cyrn}{\cyri}{\cyrya} {\cyrs}{\cyrl}{\cyra}{\cyrb}{\cyro} {\cyrn}{\cyre}{\cyrl}{\cyri}{\cyrn}{\cyre}{\cyrishrt}{\cyrn}{\cyrery}{\cyrh} {\cyrd}{\cyri}{\cyrf}{\cyrf}{\cyre}{\cyrr}{\cyre}{\cyrn}{\cyrc}{\cyri}{\cyra}{\cyrl}{\cyrsftsn}{\cyrn}{\cyrery}{\cyrh} {\cyru}{\cyrr}{\cyra}{\cyrv}{\cyrn}{\cyre}{\cyrn}{\cyri}{\cyrishrt} {\cyrv} {\cyrg}{\cyri}{\cyrl}{\cyrsftsn}{\cyrb}{\cyre}{\cyrr}{\cyrt}{\cyro}{\cyrv}{\cyro}{\cyrm} {\cyrp}{\cyrr}{\cyro}{\cyrs}{\cyrt}{\cyrr}{\cyra}{\cyrn}{\cyrs}{\cyrt}{\cyrv}{\cyre}},
     journal = {Matemati\v{c}eskie issledovani\^a},
     pages = {67--71},
     publisher = {mathdoc},
     volume = {106},
     year = {1989},
     zbl = {0697.34056},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MI_1989__106_190049/}
}