@article{DE_1968_4_6_a16,
     author = {E. A. Ivanov},
     title = {{\CYRZ}{\cyra}{\cyrd}{\cyra}{\cyrch}{\cyra} {\cyro}~{\cyrp}{\cyro}{\cyrl}{\cyre} {\cyrl}{\cyri}{\cyrn}{\cyre}{\cyrishrt}{\cyrn}{\cyro}{\cyrg}{\cyro} {\cyri}{\cyrs}{\cyrt}{\cyro}{\cyrch}{\cyrn}{\cyri}{\cyrk}{\cyra} {\cyrv}~{\cyrp}{\cyrr}{\cyri}{\cyrs}{\cyru}{\cyrt}{\cyrs}{\cyrt}{\cyrv}{\cyri}{\cyri} ``{\cyrk}{\cyrr}{\cyri}{\cyrv}{\cyro}{\cyrl}{\cyri}{\cyrn}{\cyre}{\cyrishrt}{\cyrn}{\cyro}{\cyrishrt}'' {\cyrr}{\cyre}{\cyrsh}{\cyre}{\cyrt}{\cyrk}{\cyri} {\cyri}{\cyrz} {\cyrk}{\cyro}{\cyrn}{\cyre}{\cyrch}{\cyrn}{\cyro}{\cyrg}{\cyro} {\cyrch}{\cyri}{\cyrs}{\cyrl}{\cyra} {\cyrp}{\cyra}{\cyrr}{\cyra}{\cyrl}{\cyrl}{\cyre}{\cyrl}{\cyrsftsn}{\cyrn}{\cyrery}{\cyrh} {\cyrp}{\cyrr}{\cyro}{\cyrv}{\cyro}{\cyrd}{\cyro}{\cyrv}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1127--1135},
     publisher = {mathdoc},
     volume = {4},
     number = {6},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1968_4_6_a16/}
}