%0 Journal Article
%A Hong-Ke Du
%A Chun-Yan Deng
%A Mostafa Mbekhta
%A Vladimír Müller
%T On spectral properties of
 linear combinations of idempotents
%J Studia Mathematica
%D 2007
%P 211-217
%V 180
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/sm180-3-2/
%R 10.4064/sm180-3-2
%G en
%F 10_4064_sm180_3_2