@article{MS_1974__135_2_a2,
     author = {{\CYRE}.{\CYRB}. {\CYRR}{\cyra}{\cyrb}{\cyri}{\cyrn}{\cyro}{\cyrv}{\cyri}{\cyrch} and {\CYRV}.{\CYRZ}. {\CYRF}e{\cyrishrt}{\cyrn}{\cyrb}{\cyre}{\cyrr}{\cyrg}},
     title = {{\CYRN}{\cyro}{\cyrr}{\cyrm}{\cyra}{\cyrl}{\cyrsftsn}{\cyrn}{\cyrery}{\cyre} {\cyrd}{\cyre}{\cyrl}{\cyri}{\cyrt}{\cyre}{\cyrl}{\cyri} 2-{\cyrt}{\cyrr}{\cyra}{\cyrn}{\cyrz}{\cyri}{\cyrt}{\cyri}{\cyrv}{\cyrn}{\cyro}{\cyrishrt} {\cyrg}{\cyrr}{\cyru}{\cyrp}{\cyrp}{\cyrery} {\cyra}{\cyrv}{\cyrt}{\cyro}{\cyrm}{\cyro}{\cyrr}{\cyrf}{\cyri}{\cyrz}{\cyrm}{\cyro}{\cyrv} {\cyrl}{\cyri}{\cyrn}{\cyre}{\cyrishrt}{\cyrn}{\cyro} {\cyru}{\cyrp}{\cyro}{\cyrr}{\cyrya}{\cyrd}{\cyro}{\cyrch}{\cyre}{\cyrn}{\cyrn}{\cyro}{\cyrg}{\cyro} {\cyrm}{\cyrn}{\cyro}{\cyrzh}{\cyre}{\cyrs}{\cyrt}{\cyrv}{\cyra}},
     journal = {Matemati\v{c}eskij sbornik},
     pages = {189--202},
     publisher = {mathdoc},
     volume = {135},
     number = {2},
     year = {1974},
     zbl = {0343.06001},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MS_1974__135_2_a2/}
}