@article{DAN_1977_234_5_a4,
     author = {A. Dzhuraev},
     title = {Well-posed initial-value problems in a half-space for some systems of first-order equations of composite type},
     journal = {Doklady Akademii Nauk},
     pages = {1008--1011},
     publisher = {mathdoc},
     volume = {234},
     number = {5},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1977_234_5_a4/}
}