%0 Journal Article
%A O. Axelsson
%A L. Laayouni
%A S. Margenov
%T Robust Multilevel Preconditioners for Second Order Elliptic Equations and Systems of Equations
%J Mathematica balkanica
%D 2005
%P 321
%V 19
%N 3-4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MABA_2005_19_3-4_a6/
%F MABA_2005_19_3-4_a6