C. M. C. J. M. Hilmi Safiuddin, et al. “Site Investigations on the Lateral Movement of Skewed Prestressed Concrete Sleepers (PCS) Subjected to Rail Dynamic Loading”. Journal of Engineering Technology and Applied Physics, vol. 7, no. 2, Sept. 2025, pp. 55-58, doi:10.33093/jetap.2025.7.2.6.