%0 Journal Article
%A T. V. Chekmarev
%T A nonlocal problem for a system of equations of Helmholtz type
%J Differencialʹnye uravneniâ
%D 1988
%P 724-726
%V 24
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1988_24_4_a32/
%G ru
%F DE_1988_24_4_a32