Chee-Ming Chan, and Siti Farhanah S.M Johan. “SHEAR RESISTANCE IMPROVEMENT OF OIL-CONTAMINATED BALLAST LAYER WITH RUBBER SHRED INCLUSIONS”. GEOMATE Journal, vol. 11, no. 27, Nov. 2021, pp. 2723-9, https://geomatejournal.com/geomate/article/view/2762.