The envelope of a subcategory in topology and group theory. - Ahmed Ayache; Othman Echi (Int. J. Math. Math. Sci., 2005)

Universal mapping properties of some pseudovaluation domains and related quasilocal domains. - Ahmed Ayache; David E. Dobbs; Othman Echi (Int. J. Math. Math. Sci., 2006)

A Direct Proof of a Theorem concerning Treed Overrings. - Ahmed Ayache (Int. J. Math. Math. Sci., 2015)