ALEMAYEHU, M. . What is Chemical Engineering? . Zede: Journal of Ethiopian Engineers and Architects የኢትዮጵያ መሐንዲሶችና አርክቴክቶች መጽሔት, [S. l.], v. 3, p. 15–16, 2023. Disponível em: https://ejol.aau.edu.et/index.php/ZEDE/article/view/5992. Acesso em: 4 apr. 2026.