N. Dungana and T. Dubjur, “Pavement Assessment of Farm Roads in Bhutan”, ASRJETS-Journal, vol. 21, no. 1, pp. 91–98, Jun. 2016, Accessed: Mar. 17, 2026. [Online]. Available: https://www.asrjetsjournal.org/American_Scientific_Journal/article/view/1735