%0 Journal Article
%A S. I. Kovalev
%T A difference method for solving a two-dimensional spectral problem in an unbounded domain
%J Differencialʹnye uravneniâ
%D 1987
%P 1231-1240
%V 23
%N 7
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1987_23_7_a13/
%G ru
%F DE_1987_23_7_a13