%0 Journal Article
%A I. E. Kaporin
%T Two-level explicit preconditionings for the conjugate gradient method
%J Differencialʹnye uravneniâ
%D 1992
%P 329-339
%V 28
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1992_28_2_a16/
%G ru
%F DE_1992_28_2_a16