%0 Journal Article
%A V. V. Karachik
%T Solvability of a boundary value problem for the Helmholtz equation with higher-order normal derivatives on the boundary
%J Differencialʹnye uravneniâ
%D 1992
%P 907-909
%V 28
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1992_28_5_a23/
%G ru
%F DE_1992_28_5_a23