Q. S. Mohammed Shafiqu and A. A. Yassen, “Time-Dependent Behavior of Excavation in Cohesive Soils Using the Bounding Surface Model”, NUCEJ, vol. 14, no. 1, pp. 1–12, Mar. 2011, Accessed: Apr. 18, 2025. [Online]. Available: https://oldjournal.eng.nahrainuniv.edu.iq/index.php/main/article/view/596