%0 Journal Article %A V. A. Il'in %T Some properties of a~regular solution of the Helmholtz equation in a~two-dimensional domain %J Matematičeskie zametki %D 1974 %P 885-890 %V 15 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_1974_15_6_a6/ %G ru %F MZM_1974_15_6_a6