%0 Journal Article %A Carlos Segovia %T On the area function of Lusin %J Studia Mathematica %D 1969 %P 311-343 %V 33 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm-33-3-311-343/ %R 10.4064/sm-33-3-311-343 %G en %F 10_4064_sm_33_3_311_343