%0 Journal Article %A Groetsch, C.W. %A Scherzer, O. %T Optimal order of convergence for stable evaluation of differential operators %J Electronic journal of differential equations %D 1993 %V 1993 %N 4 %U http://geodesic.mathdoc.fr/item/EJDE_1993__1993_4_a0/ %G en %F EJDE_1993__1993_4_a0