@article{DE_1984_20_5_a12,
     author = {N. G. Marchuk},
     title = {Well-posedness of a mixed problem for a vector wave equation},
     journal = {Differencialʹnye uravneni\^a},
     pages = {838--843},
     publisher = {mathdoc},
     volume = {20},
     number = {5},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1984_20_5_a12/}
}