%0 Journal Article
%A Bekkai Messirdi
%A Mohammed Hichem Mortad
%A Abdelhalim Azzouz
%A Ghouti Djellouli
%T A topological characterization of the
 product of two closed operators
%J Colloquium Mathematicum
%D 2008
%P 269-278
%V 112
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/cm112-2-4/
%R 10.4064/cm112-2-4
%G en
%F 10_4064_cm112_2_4