%0 Journal Article
%A N. Ya. Kirpichnikova
%T The second approximation of the ray method for calculation of the intensity of the wave front in isotropic

%J Zapiski Nauchnykh Seminarov POMI
%D 1997
%P 79-94
%V 239
%I mathdoc
%U http://geodesic.mathdoc.fr/item/ZNSL_1997_239_a6/
%G ru
%F ZNSL_1997_239_a6