Wahyudi Efendi, Aco, Yahya Do, and Natriya Faisal Rachman. “Behavior of Rail Ballast Layer Using Mortar Foam With LISA-FEA”. Journal of Railway Transportation and Technology 1, no. 2 (November 29, 2022): 37–45. Accessed October 14, 2025. https://mail.jrtt.org/jrtt/article/view/8.