TY  - JOUR
AU  - Bekkai Messirdi
AU  - Mohammed Hichem Mortad
AU  - Abdelhalim Azzouz
AU  - Ghouti Djellouli
TI  - A topological characterization of the
 product of two closed operators
JO  - Colloquium Mathematicum
PY  - 2008
SP  - 269
EP  - 278
VL  - 112
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/cm112-2-4/
DO  - 10.4064/cm112-2-4
LA  - en
ID  - 10_4064_cm112_2_4
ER  -