%0 Journal Article
%A V. I. Koroza
%T A variation method for wave propagation boundary value problem
%J Doklady Akademii Nauk
%D 1969
%P 795-798
%V 186
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1969_186_4_a15/
%G ru
%F DAN_1969_186_4_a15