@article{DE_1972_8_1_a10,
     author = {M. Meredov},
     title = {The {Darboux} problem for a degenerate hyperbolic system},
     journal = {Differencialʹnye uravneni\^a},
     pages = {97--106},
     publisher = {mathdoc},
     volume = {8},
     number = {1},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1972_8_1_a10/}
}