%0 Journal Article
%A Hartwig, Robert E.
%A Maroulas, John
%T Focal power
%J The electronic journal of linear algebra
%D 2005
%P 56-71
%V 13
%I mathdoc
%U http://geodesic.mathdoc.fr/item/ELA_2005__13__a21/
%G en
%F ELA_2005__13__a21