Nurfatihah, N., and S. . Wulandari. “Effect of Addition of Rubber Powder and Eggshell Powder on Clay Soil Parameters in Consolidation and Direct Shear Strength Tests”. Jurnal Teknik Sipil, vol. 19, no. 1, Apr. 2023, pp. 146-57, doi:10.28932/jts.v19i1.5391.