%0 Journal Article %A D.C. Chang %T Estimates for singular integral operators with mixed type homogeneities in Hardy classes. %J Mathematische Annalen %D 1990 %P 303-322 %V 287 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/MAN_1990__287_1_164687/ %F MAN_1990__287_1_164687