%0 Journal Article %A James E. Daly %T A Necessary Condition for Calderón-Zygmund Singular Integral Operators. %J The journal of Fourier analysis and applications [[Elektronische Ressource]] %D 1999 %P 303-308 %V 5 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/JFAA_1999__5_4_59607/ %F JFAA_1999__5_4_59607