@article{DAN_1987_292_6_a6,
     author = {N. G. Marchuk},
     title = {A mixed problem for the vector wave equation},
     journal = {Doklady Akademii Nauk},
     pages = {1307--1310},
     year = {1987},
     volume = {292},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1987_292_6_a6/}
}