%0 Journal Article
%A A. V. Deryabina
%T Second-order hyperbolic equations with strong characteristic degeneracy at the initial hypersurface
%J Sbornik. Mathematics
%D 2000
%P 503-527
%V 191
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SM_2000_191_4_a1/
%G en
%F SM_2000_191_4_a1