%0 Journal Article %A L.R. Abrahamsson %A H.B. Keller %A H.O. Kreiss %T Difference Approximations for Singular Perturbations of Systems of Ordinary Differential Equations. %J Numerische Mathematik %D 1974 %P 367-392 %V 22 %I mathdoc %U http://geodesic.mathdoc.fr/item/NUMA_1974__22_132278/ %F NUMA_1974__22_132278