%0 Journal Article
%A I. V. Fryazinov
%T A certain difference approximation of the Poisson equation
%J Differencialʹnye uravneniâ
%D 1976
%P 540-548
%V 12
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1976_12_3_a13/
%G ru
%F DE_1976_12_3_a13