%0 Journal Article
%A A. P. Makhmudov
%T Nonlinear perturbations of regular spectral problems with a
%J Doklady Akademii Nauk
%D 1984
%P 1318-1323
%V 277
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1984_277_6_a8/
%G ru
%F DAN_1984_277_6_a8