@article{DE_1973_9_7_a17,
     author = {M. Meredov},
     title = {The {Goursat} and the {Darboux} problem for a certain class of hyperbolic systems},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1326--1333},
     year = {1973},
     volume = {9},
     number = {7},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1973_9_7_a17/}
}