@article{MS_1975__138_4_a4,
     author = {{\CYRA}.{\CYRM}. {\CYRI}{\cyrl}{\cyrsftsn}{\cyri}{\cyrn} and {\CYRE}.{\CYRF}. {\CYRL}{\cyre}{\cyrl}{\cyri}{\cyrk}{\cyro}{\cyrv}{\cyra}},
     title = {{\CYRM}{\cyre}{\cyrt}{\cyro}{\cyrd} {\cyrs}{\cyrr}{\cyra}{\cyrshch}{\cyri}{\cyrv}{\cyra}{\cyrn}{\cyri}{\cyrya} {\cyra}{\cyrs}{\cyri}{\cyrm}{\cyrp}{\cyrt}{\cyro}{\cyrt}{\cyri}{\cyrch}{\cyre}{\cyrs}{\cyrk}{\cyri}{\cyrh} {\cyrr}{\cyra}{\cyrz}{\cyrl}{\cyro}{\cyrzh}{\cyre}{\cyrn}{\cyri}{\cyrishrt} {\cyrd}{\cyrl}{\cyrya} {\cyru}{\cyrr}{\cyra}{\cyrv}{\cyrn}{\cyre}{\cyrn}{\cyri}{\cyrya} $\varepsilon 94 u-a(x,y)u_y=f(x,y)$ {\cyrv} {\cyrp}{\cyrr}{\cyrya}{\cyrm}{\cyro}{\cyru}{\cyrg}{\cyro}{\cyrl}{\cyrsftsn}{\cyrn}{\cyri}{\cyrk}{\cyre}},
     journal = {Matemati\v{c}eskij sbornik},
     pages = {568--583},
     publisher = {mathdoc},
     volume = {138},
     number = {4},
     year = {1975},
     zbl = {0313.35004},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MS_1975__138_4_a4/}
}