@article{DAN_1974_214_2_a3,
     author = {V. N. Gol'dberg},
     title = {On discontinuous solutions of nonlinear mixed problems for almost linear hyperbolic systems in the plane},
     journal = {Doklady Akademii Nauk},
     pages = {253--256},
     publisher = {mathdoc},
     volume = {214},
     number = {2},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1974_214_2_a3/}
}