%0 Journal Article
%A Ji-guang Sun
%T Backward perturbation analysis of certian characteristic subspaces.
%J Numerische Mathematik
%D 1993
%P 357-382
%V 65
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/NUMA_1993__65_4_133740/
%F NUMA_1993__65_4_133740