%0 Journal Article
%A V. A. Il'in
%T Relations that are exact with respect to order between $L_2$-norms of eigen- and associated functions of a second-order elliptic operator
%J Differencialʹnye uravneniâ
%D 1982
%P 30-37
%V 18
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1982_18_1_a3/
%G ru
%F DE_1982_18_1_a3