Ahmed, Raja Abdallah Bakhit; Supervisor, - Nafie A. Almuslet; Co - Supervisor, - Shaza Mohamed Yousif(Sudan University of Science and Technology, 2014-10-05)
Osman, Eshtiag Mohammed Mohammed; Supervisor, - Babiker Osman Elbashier; Co - Supervisor, - Yousif Safieldeen(Sudan University of Science and Technology, 2014-10-07)