@article{DAN_1992_325_1_a3,
     author = {M. M. Ovezova},
     title = {On the solvability of {Darboux} problems for a hyperbolic system},
     journal = {Doklady Akademii Nauk},
     pages = {24--27},
     year = {1992},
     volume = {325},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1992_325_1_a3/}
}