%0 Journal Article
%A A. Fraguela Collar
%T On the perturbation of a polyharmonic operator by potentials with small supports
%J Doklady Akademii Nauk
%D 1979
%P 34-36
%V 245
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1979_245_1_a7/
%G ru
%F DAN_1979_245_1_a7