%0 Journal Article
%A E. A. Volkov
%T On methods of refinement using higher-order differences and $h^2$-extrapolations
%J Doklady Akademii Nauk
%D 1963
%P 455-458
%V 150
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1963_150_3_a0/
%G ru
%F DAN_1963_150_3_a0