%0 Journal Article %A S. Chang %T A generalized area integral estimate and applications %J Studia Mathematica %D 1981 %P 109-121 %V 69 %N 2 %U http://geodesic.mathdoc.fr/articles/10.4064/sm-69-2-109-121/ %R 10.4064/sm-69-2-109-121 %G en %F 10_4064_sm_69_2_109_121