@article{MS_1979__152_4_a4,
     author = {{\CYRV}.{\CYRV}. {\CYRG}{\cyro}{\cyrr}{\cyrl}{\cyro}{\cyrv}},
     title = {{\CYRD}{\cyro}{\cyrs}{\cyrt}{\cyra}{\cyrt}{\cyro}{\cyrch}{\cyrn}{\cyro}{\cyre} {\cyru}{\cyrs}{\cyrl}{\cyro}{\cyrv}{\cyri}{\cyre}, {\cyrp}{\cyrr}{\cyri} {\cyrk}{\cyro}{\cyrt}{\cyro}{\cyrr}{\cyro}{\cyrm} {\cyrz}{\cyra}{\cyrm}{\cyrk}{\cyrn}{\cyru}{\cyrt}{\cyrery}{\cyre} {\cyrk}{\cyrl}{\cyra}{\cyrs}{\cyrs}{\cyrery} $k$-{\cyrz}{\cyrn}{\cyra}{\cyrch}{\cyrn}{\cyro}{\cyrishrt} {\cyrl}{\cyro}{\cyrg}{\cyri}{\cyrk}{\cyri} {\cyri}{\cyrm}{\cyre}{\cyryu}{\cyrt} {\cyrt}{\cyro}{\cyrl}{\cyrsftsn}{\cyrk}{\cyro} {\cyrt}{\cyrr}{\cyri}{\cyrv}{\cyri}{\cyra}{\cyrl}{\cyrsftsn}{\cyrn}{\cyrery}{\cyre} {\cyrk}{\cyro}{\cyrn}{\cyrg}{\cyrr}{\cyru}{\cyrerev}{\cyrn}{\cyrc}{\cyri}{\cyri}},
     journal = {Matemati\v{c}eskij sbornik},
     pages = {551--578},
     publisher = {mathdoc},
     volume = {152},
     number = {4},
     year = {1979},
     zbl = {0434.03019},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MS_1979__152_4_a4/}
}