%0 Journal Article %A Steve Hofmann %T On certain nonstandard Calderón-Zygmund operators %J Studia Mathematica %D 1994 %P 105-131 %V 109 %N 2 %U http://geodesic.mathdoc.fr/articles/10.4064/sm-109-2-105-131/ %R 10.4064/sm-109-2-105-131 %G en %F 10_4064_sm_109_2_105_131