@article{DAN_1989_309_1_a16,
     author = {V. P. Smyshlyaev},
     title = {High-frequency asymptotics of the {Green} function of the {Helmholtz}},
     journal = {Doklady Akademii Nauk},
     pages = {74--77},
     publisher = {mathdoc},
     volume = {309},
     number = {1},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1989_309_1_a16/}
}