Chee-Ming Chan, and Norsharina Abdul Rahman. “RELATING THE BREAKAGE INDEX AND SETTLEMENT OF GEOGRID-REINFORCED BALLAST”. GEOMATE Journal 10, no. 19 (November 21, 2021): 1687–1692. Accessed April 26, 2024. https://geomatejournal.com/geomate/article/view/2008.