%0 Journal Article
%A Yu. R. Akopian
%A R. Z. Hovhannisyan
%T On the two-level preconditioning in least squares method
%J Proceedings of the Yerevan State University. Physical and mathematical sciences
%D 2014
%P 7-15
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/UZERU_2014_1_a1/
%G en
%F UZERU_2014_1_a1