%0 Journal Article %A Abdellah Youssfi %T Regularity properties of singular integral operators %J Studia Mathematica %D 1996 %P 199-217 %V 119 %N 3 %U http://geodesic.mathdoc.fr/articles/10.4064/sm-119-3-199-217/ %R 10.4064/sm-119-3-199-217 %G en %F 10_4064_sm_119_3_199_217