"On The Integration and Evaluation of Vertical Control Information and Uncertainties in Leveling Networks Using Least Squares Modeling". University of Khartoum Engineering Journal 7, no. 2 (أكتوبر 23, 2022). تاريخ الوصول يوليو 8, 2026. https://onlinejournals.uofk.edu/kuej/article/view/972.