%0 Journal Article
%A Z. A. Yanson
%T Asymptotics of solutions of the Helmholtz equation in a region of caustic shadow I.
%J Zapiski Nauchnykh Seminarov POMI
%D 1983
%P 172-185
%V 128
%U http://geodesic.mathdoc.fr/item/ZNSL_1983_128_a19/
%G ru
%F ZNSL_1983_128_a19