%0 Journal Article
%A Jan Mandel
%T On block diagonal and Schur complement preconditioning.
%J Numerische Mathematik
%D 1990
%P 79-94
%V 58
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/NUMA_1990__58_5_133488/
%F NUMA_1990__58_5_133488