Osman,Abdelmoniem Elwidaa; Supervisor,-Osman Mohamed Ahmed Taha; CO-Supervisor,-Nafie Abd Allattief Almusle(sudan university of scince and technology, 2010-12-01)
Sulaiman, Mohamed Gusm Alla Muhgoub; Supervisor, - Nafie Almuslet; Co - Supervisor, - Elfatih Ahmed Hassan(sudan university of scince and technology, 2010-08-01)