%0 Journal Article %A Wu, Jiahong %T Quasi-geostrophic type equations with weak initial data %J Electronic Journal of Differential Equations %D 1998 %V 1998 %I mathdoc %U http://geodesic.mathdoc.fr/item/EJDE_1998__1998__a10/ %G en %F EJDE_1998__1998__a10