Akindeji-Oladeji, O., J. A. Awomeso, A. M. Taiwo, and S. Abu. “Sustainable Development of Roadways in Africa”. Materiales de Construcción 62, no. 308 (December 30, 2012): 607–614. Accessed April 27, 2024. https://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/673.