@article{DE_1975_11_7_a13,
     author = {V. N. Gol'dberg},
     title = {Discontinuous solutions of mixed problems for almost linear hyperbolic systems in the plane},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1278--1292},
     publisher = {mathdoc},
     volume = {11},
     number = {7},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1975_11_7_a13/}
}