Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1988_298_5_a7, author = {N. G. Marchuk}, title = {Symmetric hyperbolic systems of second-order equations}, journal = {Doklady Akademii Nauk}, pages = {1063--1068}, publisher = {mathdoc}, volume = {298}, number = {5}, year = {1988}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1988_298_5_a7/} }
N. G. Marchuk. Symmetric hyperbolic systems of second-order equations. Doklady Akademii Nauk, Tome 298 (1988) no. 5, pp. 1063-1068. http://geodesic.mathdoc.fr/item/DAN_1988_298_5_a7/