%0 Journal Article
%A Tarama, Shigeo
%T Energy estimate for wave equations with coefficients in some Besov type class
%J Electronic Journal of Differential Equations
%D 2007
%V 2007
%I mathdoc
%U http://geodesic.mathdoc.fr/item/EJDE_2007__2007__a116/
%G en
%F EJDE_2007__2007__a116