%0 Journal Article
%A Yu. A. Konyaev
%T On a method of studying certain problems in perturbation theory
%J Sbornik. Mathematics
%D 1995
%P 507-517
%V 80
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SM_1995_80_2_a12/
%G en
%F SM_1995_80_2_a12