Muzamir Hasan, Ieszaliana Ali, and Masayuki Hyodo. “STRENGTH OF SOFT CLAY REINFORCED WITH 10 MM SINGLE CRUSHED COCONUT SHELL (CCS) COLUMN”. GEOMATE Journal, vol. 17, no. 63, May 2019, pp. 353-9, https://geomatejournal.com/geomate/article/view/2604.