Mensahn, E. S. K., S. A. Wada, and L. Lugeiyamu. “Structural Evaluation of Conventional and Modified Flexible Pavement Performance”. ARID ZONE JOURNAL OF ENGINEERING, TECHNOLOGY AND ENVIRONMENT, Vol. 17, no. 4, Dec. 2021, pp. 535-46, https://azojete.com.ng/index.php/azojete/article/view/534.