@article{DE_1981_17_6_a14,
     author = {Z. O. Mel'nik},
     title = {A nonclassical boundary value problem for a first-order hyperbolic system with two independent variables},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1096--1104},
     publisher = {mathdoc},
     volume = {17},
     number = {6},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1981_17_6_a14/}
}