Ahmed, Ahmed Mohamed Osman; Ahmed El Amin, Hadia Omer; Alouth, Mawada Babiker Mahjoub; Almojtaba, Tawsol Omer Almahdi(Sudan University of Science and Technology, 2014-09-10)
Abu Al-Gasim, Ahmed Taj El-Deen; Gafaar, Mohamed Hussein; El-zeber, Mohanad Mohamed; Waddie, Mojahid Hamdan(Sudan University of Science and Technology, 2014-09-10)