S.Karthika, V.Jayaraman, T.Karthi, P.Murugesan, and K.C.Denesh. “Flexible Pavement Design for Rural Roads by Improving Expansive Soil”. International Journal of Intellectual Advancements and Research in Engineering Computations, vol. 5, no. 1, Mar. 2017, pp. 1052-6, https://ijiarec.com/ijiarec/article/view/1642.