%0 Journal Article
%A A. G. Ramm
%T Expansion in eigenfunctions of a nonselfadjoint differential operator of an exterior boundary value problem
%J Differencialʹnye uravneniâ
%D 1971
%P 737-742
%V 7
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1971_7_4_a12/
%G ru
%F DE_1971_7_4_a12