%0 Journal Article
%A V. M. Babich
%T On the exact justification of short wave approximation in three dimension case
%J Zapiski Nauchnykh Seminarov POMI
%D 1973
%P 23-51
%V 34
%I mathdoc
%U http://geodesic.mathdoc.fr/item/ZNSL_1973_34_a2/
%G ru
%F ZNSL_1973_34_a2