%0 Journal Article
%A V. A. Tsetsocho
%A A. V. Belonosova
%A A. S. Belonosov
%T Calculation formulas of linear geometrical spreading at ray tracing in a~3D block-inhomogeneous gradient medium
%J Sibirskij žurnal vyčislitelʹnoj matematiki
%D 2009
%P 325-339
%V 12
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SJVM_2009_12_3_a7/
%G ru
%F SJVM_2009_12_3_a7