%0 Journal Article %A R.H. jr. Martin %T Nonlinear Perturbations of Uncoupled Systems of Elliptic Operators. %J Mathematische Annalen %D 1974 %P 155-170 %V 211 %I mathdoc %U http://geodesic.mathdoc.fr/item/MAN_1974__211_162642/ %F MAN_1974__211_162642