%0 Journal Article %A Tord Sjödin %T Thinness in non-linear potential theory for non-isotropic Sobolev spaces %J Annales Fennici Mathematici %D 1997 %P 313-338 %V 22 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/AFM_1997_22_2_a4/ %G en %F AFM_1997_22_2_a4