@article{DE_1971_7_8_a10,
     author = {V. S. Vinogradov},
     title = {A boundary value problem for a first order elliptic equation on the plane},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1440--1448},
     publisher = {mathdoc},
     volume = {7},
     number = {8},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1971_7_8_a10/}
}