%0 Journal Article %A Nicola Garofalo %A Ermanno Lanconelli %T Asymptotic Behavior of Fundamental Solutions and Potential Theory of Prabolic Operators with Variable Coeeficients. %J Mathematische Annalen %D 1989 %P 211-240 %V 283 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/MAN_1989__283_1_164505/ %F MAN_1989__283_1_164505