Global Analysis and the Periodic Character of a Class of Difference Equations. - George E. Chatzarakis; Elmetwally M. Elabbasy; Osama Moaaz; Hamida Mahjoub (Axioms, 2019)

On the Periodicity of General Class of Difference Equations. - Osama Moaaz; Hamida Mahjoub; Ali Muhib (Axioms, 2020)