%0 Journal Article
%A V. I. Plotnikov
%T An energy inequality and the overdeterminacy property of a system of eigenfunctions
%J Izvestiya. Mathematics 
%D 1968
%P 695-707
%V 2
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IM2_1968_2_4_a1/
%G en
%F IM2_1968_2_4_a1