%0 Journal Article
%A Yu. G. Borisovich
%A B. M. Darinskii
%A O. V. Kunakovskaya
%T Application of topological methods to estimate the number of longitudinal elastic waves in crystals
%J Teoretičeskaâ i matematičeskaâ fizika
%D 1993
%P 146-152
%V 94
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/TMF_1993_94_1_a10/
%G ru
%F TMF_1993_94_1_a10