%0 Journal Article
%A V. M. Babich
%A N. S. Grigor'ev
%T Space-time ray method of the calculation of waves in slightly inhomogeneous layered medium
%J Zapiski Nauchnykh Seminarov POMI
%D 1980
%P 5-18
%V 99
%I mathdoc
%U http://geodesic.mathdoc.fr/item/ZNSL_1980_99_a1/
%G ru
%F ZNSL_1980_99_a1