%0 Journal Article %A Bonafede, Salvatore %T A weak maximum principle and estimates of ${\rm ess}\sup\sb \Omega u$ for nonlinear degenerate elliptic equations %J Czechoslovak Mathematical Journal %D 1996 %P 259-269 %V 46 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1996.127289/ %R 10.21136/CMJ.1996.127289 %G en %F 10_21136_CMJ_1996_127289