@article{DAN_1989_304_3_a15,
     author = {V. F. Kravchenko and V. G. Sologub},
     title = {An asymptotic method for solving problems on the scattering of},
     journal = {Doklady Akademii Nauk},
     pages = {577--582},
     publisher = {mathdoc},
     volume = {304},
     number = {3},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1989_304_3_a15/}
}