@article{DAN_1978_238_2_a7,
     author = {V. M. Byrdin},
     title = {Radiation conditions for certain boundary value problems with the {Helmholtz} equations},
     journal = {Doklady Akademii Nauk},
     pages = {293--295},
     publisher = {mathdoc},
     volume = {238},
     number = {2},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1978_238_2_a7/}
}