%0 Journal Article %A Fanelli, Luca %A Lucente, Sandra %T The critical case for a semilinear weakly hyperbolic equation %J Electronic Journal of Differential Equations %D 2004 %V 2004 %I mathdoc %U http://geodesic.mathdoc.fr/item/EJDE_2004__2004__a22/ %G en %F EJDE_2004__2004__a22