Mohammed Ali Mohammed Al-Bared, Indra Sati Hamonangan Harahap, and Aminaton Marto. “SUSTAINABLE STRENGTH IMPROVEMENT OF SOFT CLAY STABILIZED WITH TWO SIZES OF RECYCLED ADDITIVE”. GEOMATE Journal, vol. 15, no. 51, May 2018, pp. 39-46, https://geomatejournal.com/geomate/article/view/1004.