WALLDEN, L. .; HABTU, G. . Need for standardization . Zede Journal of Ethiopian Engineers and Architects, [S. l.], v. 4, p. 37–41, 2023. Disponível em: https://ejol.aau.edu.et/index.php/ZEDE/article/view/6011. Acesso em: 4 apr. 2025.