%0 Journal Article %A Joachim Michel %A Alessandro Perotti %T Ck-Regularity for the ?-equation on Strictly Pseudoconvex Domains with Piecewise Smooth Boundaries. %J Mathematische Zeitschrift %D 1990 %P 415-428 %V 203 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZ_1990__203_3_174138/ %F MZ_1990__203_3_174138