@article{DAN_1971_196_2_a9,
     author = {A. B. Nersesyan},
     title = {The {Cauchy} problem for a symmetric hyperbolic system degenerating on the initial hyperplane},
     journal = {Doklady Akademii Nauk},
     pages = {289--292},
     publisher = {mathdoc},
     volume = {196},
     number = {2},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1971_196_2_a9/}
}