%0 Journal Article %A Anders Björn %T Characterizations of $p$-superharmonic functions on metric spaces %J Studia Mathematica %D 2005 %P 45-62 %V 169 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm169-1-3/ %R 10.4064/sm169-1-3 %G en %F 10_4064_sm169_1_3