%0 Journal Article
%A E. A. Volkov
%T The unimprovability of the error estimate of the method of refinements with higher order differences in a certain class of solutions of Poisson's equations
%J Differencialʹnye uravneniâ
%D 1968
%P 136-139
%V 4
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1968_4_1_a11/
%G ru
%F DE_1968_4_1_a11