%0 Journal Article %A Matts Essén %A Vladimir Eiderman %T On Exceptional Sets for Superharmonic Functions in a Halfspace: An Inverse Problem. %J Mathematica Scandinavica %D 1995 %P 273-288 %V 76 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/MS2_1995__76_2_167343/ %F MS2_1995__76_2_167343