"Physico-Chemical Properties of Expansive Soils from Sudan and Their Effects on Intrinsic Swelling and Shrinkage". University of Khartoum Engineering Journal 2, no. ENGINEERING (نوفمبر 23, 2022). تاريخ الوصول يوليو 8, 2026. https://onlinejournals.uofk.edu/kuej/article/view/1212.