%0 Journal Article
%A M. D. Dolberg
%A N. N. Yasnitskaya
%T A lower boud bound for oscillation frequencies of elastic systems
%J Doklady Akademii Nauk
%D 1967
%P 507-510
%V 173
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1967_173_3_a5/
%G ru
%F DAN_1967_173_3_a5