@article{DAN_1987_296_1_a17,
     author = {L. V. Berlyand and S. Yu. Dobrokhotov},
     title = {{\textquotedblleft}Operator separation of variables{\textquotedblright} in problems of short-wave},
     journal = {Doklady Akademii Nauk},
     pages = {80--84},
     year = {1987},
     volume = {296},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1987_296_1_a17/}
}