@article{DAN_1983_273_4_a14,
     author = {A. G. Voronovich},
     title = {On the limits of applicability of {Kirchhoff} approximation in problems of sound},
     journal = {Doklady Akademii Nauk},
     pages = {830--834},
     year = {1983},
     volume = {273},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1983_273_4_a14/}
}