%0 Journal Article %A A. G. Voronovich %T On an approximate method of calculation of sound scattering by a rough free surface %J Doklady Akademii Nauk %D 1983 %P 1351-1355 %V 272 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1983_272_6_a17/ %G ru %F DAN_1983_272_6_a17