S, B., and B. S. “Shear Strength Characteristics of Coir Fibre Stabilised Stone Matrix Asphalt Mixtures”. International Journal of Sustainable Construction Engineering and Technology, Vol. 6, no. 2, Sept. 2015, pp. 26-36, https://publisher.uthm.edu.my/ojs/index.php/IJSCET/article/view/1093.