%0 Journal Article %A Neil S. Trudinger %T Local Estimates for Subsolutions and Supersolutions of General Second Order Elliptic Quasilinear Equations. %J Inventiones mathematicae %D 1980 %P 67-80 %V 61 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM_1980__61_142753/ %F IM_1980__61_142753