%0 Journal Article
%A V. M. Babich
%T The multidimensional WKB method or the ray method. Its analogues and generalizations
%J Itogi Nauki i Tekhniki. Seriya Sovremennye Problemy Matematiki. Fundamental'nye Napravleniya 
%D 1988
%P 93-134
%V 34
%I mathdoc
%U http://geodesic.mathdoc.fr/item/INTF_1988_34_a2/
%G ru
%F INTF_1988_34_a2