%0 Journal Article
%A Sze-Ping Wong
%T Preconditioning P1 nonconforming finite elements: condition numbers and singular value distributions.
%J Numerische Mathematik
%D 1993
%P 253-272
%V 65
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/NUMA_1993__65_4_133734/
%F NUMA_1993__65_4_133734