%0 Journal Article
%A F. I. Fedorov
%T An approximate general theory of elastic waves in crystals
%J Doklady Akademii Nauk
%D 1964
%P 792-794
%V 155
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1964_155_4_a18/
%G ru
%F DAN_1964_155_4_a18