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@article{DAN_1992_327_4_a0, author = {A. V. Bitsadze}, title = {On a hyperbolic system of first-order quasilinear equations}, journal = {Doklady Akademii Nauk}, pages = {423--427}, publisher = {mathdoc}, volume = {327}, number = {4}, year = {1992}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1992_327_4_a0/} }
A. V. Bitsadze. On a hyperbolic system of first-order quasilinear equations. Doklady Akademii Nauk, Tome 327 (1992) no. 4, pp. 423-427. http://geodesic.mathdoc.fr/item/DAN_1992_327_4_a0/