%0 Journal Article %A A. Calderón %T Estimates for singular integral operators in terms of maximal functions %J Studia Mathematica %D 1972 %P 563-582 %V 44 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm-44-6-563-582/ %R 10.4064/sm-44-6-563-582 %G en %F 10_4064_sm_44_6_563_582