@article{DAN_1975_224_3_a23,
     author = {I. N. Kovalenko and A. A. Levitskaya},
     title = {{\CYRP}{\cyro}{\cyrp}{\cyrr}{\cyra}{\cyrv}{\cyrk}{\cyri} {\cyrk} {\cyrs}{\cyrt}{\cyra}{\cyrt}{\cyrsftsn}{\cyre} {``{\CYRP}{\cyrr}{\cyre}{\cyrd}{\cyre}{\cyrl}{\cyrsftsn}{\cyrn}{\cyro}{\cyre}} {\cyrp}{\cyro}{\cyrv}{\cyre}{\cyrd}{\cyre}{\cyrn}{\cyri}{\cyre} {\cyrch}{\cyri}{\cyrs}{\cyrl}{\cyra} {\cyrr}{\cyre}{\cyrsh}{\cyre}{\cyrn}{\cyri}{\cyrishrt} {\cyrs}{\cyri}{\cyrs}{\cyrt}{\cyre}{\cyrm}{\cyrery} {\cyrs}{\cyrl}{\cyru}{\cyrch}{\cyra}{\cyrishrt}{\cyrn}{\cyrery}{\cyrh} {\cyrl}{\cyri}{\cyrn}{\cyre}{\cyrishrt}{\cyrn}{\cyrery}{\cyrh} {\cyru}{\cyrr}{\cyra}{\cyrv}{\cyrn}{\cyre}{\cyrn}{\cyri}{\cyrishrt} {\cyrn}{\cyra}{\cyrd} {\cyrk}{\cyro}{\cyrn}{\cyre}{\cyrch}{\cyrn}{\cyrery}{\cyrm} {\cyrp}{\cyro}{\cyrl}{\cyre}{\cyrm} {\cyri} {\cyrk}{\cyro}{\cyrn}{\cyre}{\cyrch}{\cyrn}{\cyrery}{\cyrm} {\cyrk}{\cyro}{\cyrl}{\cyrsftsn}{\cyrc}{\cyro}{\cyrm}'' {({\CYRD}{\CYRA}{\CYRN},} {\cyrt}.~221, {\No~4,} 1975~{\cyrg}.)},
     journal = {Doklady Akademii Nauk},
     pages = {10},
     publisher = {mathdoc},
     volume = {224},
     number = {3},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1975_224_3_a23/}
}