%0 Journal Article
%A Yu. V. Egorov
%A V. A. Kondratiev
%T Estimation of the smallest eigenvalue for an elliptic operator
%J Differencialʹnye uravneniâ
%D 1984
%P 1397-1403
%V 20
%N 8
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1984_20_8_a12/
%G ru
%F DE_1984_20_8_a12