%0 Journal Article
%A R. Semerdjieva
%T On a Class of Hyperbolic Equations with Order Degeneration
%J Mathematica balkanica
%D 2001
%P 75
%V 15
%N 1-2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MABA_2001_15_1-2_a7/
%F MABA_2001_15_1-2_a7