%0 Journal Article %A Mariano Giaquinta %A Guiseppe Modica %T Almost-Everywhere Regularity Results for Solutions of Non Linear Elliptic Systems. %J Manuscripta mathematica %D 1979 %P 109-158 %V 28 %I mathdoc %U http://geodesic.mathdoc.fr/item/MM2_1979__28_154633/ %F MM2_1979__28_154633