%0 Journal Article
%A L. Yu. Kolotilina
%T Twofold deflation preconditioning of linear algebraic systems.~I.~Theory
%J Zapiski Nauchnykh Seminarov POMI
%D 1995
%P 95-152
%V 229
%I mathdoc
%U http://geodesic.mathdoc.fr/item/ZNSL_1995_229_a3/
%G ru
%F ZNSL_1995_229_a3