Teferra, Alemayehu, and Solomon Yohannes. “Investigations on the Expansive Soils of Addis Ababa”. Zede: Journal of Ethiopian Engineers and Architects የኢትዮጵያ መሐንዲሶችና አርክቴክቶች መጽሔት 7 (January 31, 2023): 1–9. Accessed March 16, 2026. https://ejol.aau.edu.et/index.php/ZEDE/article/view/6187.