%0 Journal Article %A Charles A. Stuart %T Maximal and Minimal Solutions of Elliptic Differential Equations with Discontinuous Non-Linearities. %J Mathematische Zeitschrift %D 1978 %P 239-250 %V 163 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZ_1978__163_172755/ %F MZ_1978__163_172755