%0 Journal Article %A Stetter, Hans J. %T Richardson-extrapolation and optimal estimation %J Applications of Mathematics %D 1968 %P 187-190 %V 13 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/AM.1968.103154/ %R 10.21136/AM.1968.103154 %G en %F 10_21136_AM_1968_103154