%0 Journal Article
%A I. N. Astaf'eva
%A V. I. Malovikov
%T Second solutions of equations involving positive operators in degenerate cases
%J Matematičeskie zametki
%D 1971
%P 143-149
%V 9
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MZM_1971_9_2_a4/
%G ru
%F MZM_1971_9_2_a4