Bouraya C.; Seddik Ameur: On the characterizations of some distinguished subclasses of Hilbert space operators. In: Acta scientiarum mathematicarum, (84) 3-4. pp. 611-627. (2018)
Seddik Ameur: On the norm of elementary operators in standard operator algebras. In: Acta scientiarum mathematicarum, (70) 1-2. pp. 229-236. (2004)