%0 Journal Article
%A Yu. V. Pokornyi
%T Inequality for second characteristic values of positive operators of certain classes
%J Matematičeskie zametki
%D 1971
%P 27-33
%V 9
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MZM_1971_9_1_a3/
%G ru
%F MZM_1971_9_1_a3