%0 Journal Article %A Potra, Florian A. %T On superadditive rates of convergence %J ESAIM: Mathematical Modelling and Numerical Analysis %D 1985 %P 671-685 %V 19 %N 4 %I AFCET - Gauthier-Villars %C Paris %U http://geodesic.mathdoc.fr/item/M2AN_1985__19_4_671_0/ %G en %F M2AN_1985__19_4_671_0