%0 Journal Article
%A V. B. Filippov
%T On the exact justification of the short wave approximation in a~shadow region
%J Zapiski Nauchnykh Seminarov POMI
%D 1973
%P 142-205
%V 34
%I mathdoc
%U http://geodesic.mathdoc.fr/item/ZNSL_1973_34_a8/
%G ru
%F ZNSL_1973_34_a8