%0 Journal Article
%A Friedland, Shmuel
%A Virnik, Elena
%T Nonnegativity of Schur complements of nonnegative idempotent matrices
%J The electronic journal of linear algebra
%D 2008
%P 426-435
%V 17
%I mathdoc
%U http://geodesic.mathdoc.fr/item/ELA_2008__17__a15/
%G en
%F ELA_2008__17__a15