@article{MAT_1970_14_4_a3,
     author = {H.-O. Kreiss},
     title = {Initial boundary value problems for hyperbolic systems},
     journal = {Matematika},
     pages = {98--115},
     publisher = {mathdoc},
     volume = {14},
     number = {4},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MAT_1970_14_4_a3/}
}