%0 Journal Article %A V. N. Gol'dberg %T Discontinuous solutions of mixed problems for almost linear hyperbolic systems in the plane %J Differencialʹnye uravneniâ %D 1975 %P 1278-1292 %V 11 %N 7 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1975_11_7_a13/ %G ru %F DE_1975_11_7_a13