@article{DE_1977_13_8_a17,
     author = {A. B. Akimov and B. A. Iskenderov},
     title = {The limit absorption principle, the limit amplitude principle and partial radiation conditions for a boundary value problem in an $n$-dimensional layer for the {Helmholtz} equation},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1503--1505},
     publisher = {mathdoc},
     volume = {13},
     number = {8},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1977_13_8_a17/}
}