@article{DE_1986_22_4_a10,
     author = {N. G. Marchuk},
     title = {Hyperbolically symmetrizable systems of equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {652--662},
     publisher = {mathdoc},
     volume = {22},
     number = {4},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1986_22_4_a10/}
}