@article{10_4064_aa_49_5_449_458,
     author = {{\CYRS}. {\CYRK}{\cyro}{\cyrt}{\cyro}{\cyrv}},
     title = {S-{\cyrc}{\cyre}{\cyrl}{\cyrery}{\cyre} {\cyrr}{\cyre}{\cyrsh}{\cyre}{\cyrn}{\cyri}{\cyrya} {\cyro}{\cyrd}{\cyrn}{\cyro}{\cyrg}{\cyro} {\cyrk}{\cyrl}{\cyra}{\cyrs}{\cyrs}{\cyra} {\cyrd}{\cyri}{\cyro}{\cyrf}{\cyra}{\cyrn}{\cyrt}{\cyro}{\cyrv}{\cyrery}{\cyrh} {\cyru}{\cyrr}{\cyra}{\cyrv}{\cyrn}{\cyre}{\cyrn}{\cyri}{\cyrishrt} {\cyrn}{\cyro}{\cyrr}{\cyrm}{\cyre}{\cyrn}{\cyrn}{\cyro}{\cyrg}{\cyro} {\cyrv}{\cyri}{\cyrd}{\cyra} {\cyrs} {\cyrp}{\cyro}{\cyrl}{\cyri}{\cyrn}{\cyro}{\cyrm}{\cyri}{\cyra}{\cyrl}{\cyrsftsn}{\cyrn}{\cyro}{\cyrishrt} {\cyrp}{\cyrr}{\cyra}{\cyrv}{\cyro}{\cyrishrt} {\cyrch}{\cyra}{\cyrs}{\cyrt}{\cyrsftsn}{\cyryu}},
     journal = {Acta Arithmetica},
     pages = {449--458},
     publisher = {mathdoc},
     volume = {49},
     number = {5},
     year = {1987},
     doi = {10.4064/aa-49-5-449-458},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-49-5-449-458/}
}