Zerayohannes, Girma, and Teferra Desta. 2023. “EVALUATION OF APPROXIMATE DESIGN PROCEDURES FOR BIAXIALLY LOADED RECTANGULAR REINFORCED CONCRETE COLUMNS”. Zede: Journal of Ethiopian Engineers and Architects የኢትዮጵያ መሐንዲሶችና አርክቴክቶች መጽሔት 18 (January):27-36. https://ejol.aau.edu.et/index.php/ZEDE/article/view/6645.