%0 Journal Article %A Michael Cowling %T An Application of Littlewood-Paley Theory in Harmonie Analysis. %J Mathematische Annalen %D 1979 %P 83-96 %V 241 %I mathdoc %U http://geodesic.mathdoc.fr/item/MAN_1979__241_163254/ %F MAN_1979__241_163254