Bashir, Mubarak Musa Haroun; Supervised, - Samia Osman Yagoub; Co-Supervised, - Suliman Adam Ahmed(Sudan University of Science and Technology, 2015-08-07)
Khalifa, Sayed Aidroos Ahmed; Supervisor -, Elsadig Elmahdi Ahmed; Co-supervisors -, Yassein Mohammed Ibrahim Dagash(Sudan University of Science and Technology, 2016-01-10)