@article{DE_1991_27_10_a21,
     author = {P. A. Vakulchik and A. N. Rashid},
     title = {{\CYRI}{\cyrs}{\cyrs}{\cyrl}{\cyre}{\cyrd}{\cyro}{\cyrv}{\cyra}{\cyrn}{\cyri}{\cyre} {\cyrs}{\cyrh}{\cyro}{\cyrd}{\cyri}{\cyrm}{\cyro}{\cyrs}{\cyrt}{\cyri} {\cyrn}{\cyre}{\cyrya}{\cyrv}{\cyrn}{\cyro}{\cyrishrt} {\cyrr}{\cyra}{\cyrz}{\cyrn}{\cyro}{\cyrs}{\cyrt}{\cyrn}{\cyro}{\cyrishrt} {\cyrs}{\cyrh}{\cyre}{\cyrm}{\cyrery} {\cyrr}{\cyre}{\cyrsh}{\cyre}{\cyrn}{\cyri}{\cyrya} {\cyrz}{\cyra}{\cyrd}{\cyra}{\cyrch}{\cyri} {\cyro}~{\cyrch}{\cyri}{\cyrs}{\cyrl}{\cyre}{\cyrn}{\cyrn}{\cyro}{\cyrm} {\cyrm}{\cyro}{\cyrd}{\cyre}{\cyrl}{\cyri}{\cyrr}{\cyro}{\cyrv}{\cyra}{\cyrn}{\cyri}{\cyri} {\cyrt}{\cyre}{\cyrr}{\cyrm}{\cyro}{\cyrk}{\cyro}{\cyrn}{\cyrv}{\cyre}{\cyrk}{\cyrt}{\cyri}{\cyrv}{\cyrn}{\cyrery}{\cyrh} {\cyrp}{\cyrr}{\cyro}{\cyrc}{\cyre}{\cyrs}{\cyrs}{\cyro}{\cyrv} {\cyrv}{\cyrn}{\cyru}{\cyrt}{\cyrr}{\cyri} {\cyrc}{\cyri}{\cyrl}{\cyri}{\cyrn}{\cyrd}{\cyrr}{\cyri}{\cyrch}{\cyre}{\cyrs}{\cyrk}{\cyro}{\cyrg}{\cyro} {\cyrs}{\cyro}{\cyrs}{\cyru}{\cyrd}{\cyra}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1817--1819},
     publisher = {mathdoc},
     volume = {27},
     number = {10},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1991_27_10_a21/}
}