%0 Journal Article %A Tersenov, Aris S. %T Viscosity subsolutions and supersolutions for non-uniformly and degenerate elliptic equations %J Archivum mathematicum %D 2009 %P 19-35 %V 45 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/ARM_2009__45_1_a1/ %G en %F ARM_2009__45_1_a1