TY  - JOUR
AU  - Tarama, Shigeo
TI  - Energy estimate for wave equations with coefficients in some Besov type class
JO  - Electronic Journal of Differential Equations
PY  - 2007
VL  - 2007
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/EJDE_2007__2007__a216/
LA  - en
ID  - EJDE_2007__2007__a216
ER  -