@article{DE_1967_3_12_a20,
     author = {E. A. Ivanov},
     title = {{\CYRP}{\cyro}{\cyrp}{\cyrr}{\cyra}{\cyrv}{\cyrk}{\cyra} {\cyrk}~{\cyrs}{\cyrt}{\cyra}{\cyrt}{\cyrsftsn}{\cyre}: {{\guillemotleft}{\CYRP}{\cyro}{\cyrl}{\cyre}} {\cyrg}{\cyro}{\cyrr}{\cyri}{\cyrz}{\cyro}{\cyrn}{\cyrt}{\cyra}{\cyrl}{\cyrsftsn}{\cyrn}{\cyro}{\cyrg}{\cyro} {\cyrm}{\cyra}{\cyrg}{\cyrn}{\cyri}{\cyrt}{\cyrn}{\cyro}{\cyrg}{\cyro} {\cyrd}{\cyri}{\cyrp}{\cyro}{\cyrl}{\cyrya} {\cyrv}~{\cyrp}{\cyrr}{\cyri}{\cyrs}{\cyru}{\cyrt}{\cyrs}{\cyrt}{\cyrv}{\cyri}{\cyri} {\cyrs}{\cyrf}{\cyre}{\cyrr}{\cyro}{\cyri}{\cyrd}{\cyra}{\guillemotright} ({\cyrt}.~3, {\No~9,} 1967)},
     journal = {Differencialʹnye uravneni\^a},
     pages = {2194},
     publisher = {mathdoc},
     volume = {3},
     number = {12},
     year = {1967},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1967_3_12_a20/}
}