%0 Journal Article %A Z. O. Mel'nik %T A nonclassical boundary value problem for a first-order hyperbolic system with two independent variables %J Differencialʹnye uravneniâ %D 1981 %P 1096-1104 %V 17 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1981_17_6_a14/ %G ru %F DE_1981_17_6_a14