${L}_{1}$ spaces fail a certain approximative property. Kamal, Aref — 1998 International Journal of Mathematics and Mathematical Sciences

Approximation by finite rank operators with ranges in ${c}_{o}$. Kamal, Aref — 1993 International Journal of Mathematics and Mathematical Sciences

Approximation by compact operators over spaces of continuous functions. Aref Kamal — 1992 Collectanea Mathematica