@article{DAN_1991_318_1_a3,
     author = {A. Dzhuraev},
     title = {Some mixed problems for first-order hyperbolic systems},
     journal = {Doklady Akademii Nauk},
     pages = {24--28},
     publisher = {mathdoc},
     volume = {318},
     number = {1},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1991_318_1_a3/}
}