TY  - JOUR
AU  - Mortad, Mohammed Hichem
TI  - On the Adjoint and the Closure of the Sum of Two Unbounded Operators
JO  - Canadian mathematical bulletin
PY  - 2011
SP  - 498
EP  - 505
VL  - 54
IS  - 3
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CMB-2011-041-7/
DO  - 10.4153/CMB-2011-041-7
ID  - 10_4153_CMB_2011_041_7
ER  -