%0 Journal Article %A Pawel Kröger %T Harmonic spaces associated with parabolic and elliptic differential operators. %J Mathematische Annalen %D 1989 %P 393-404 %V 285 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/MAN_1989__285_1_164608/ %F MAN_1989__285_1_164608