%0 Journal Article %A A.G. Ramm %A A. van der Sluis %T Calculating Singular Integrals as an Ill-posed Problem. %J Numerische Mathematik %D 1990 %P 139-146 %V 57 %N 6-7 %I mathdoc %U http://geodesic.mathdoc.fr/item/NUMA_1990__57_6-7_133441/ %F NUMA_1990__57_6-7_133441