%0 Journal Article
%A O. N. Naida
%T Ray approximation in the acoustics of inhomogeneous anisotropic media
%J Doklady Akademii Nauk
%D 1977
%P 842-845
%V 236
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1977_236_4_a15/
%G ru
%F DAN_1977_236_4_a15