H. Putra, A. B. Arrazzaq, R. M. I. Hidayatullah, M. Lamuse, F. R. Ananda, and A. Prayoga, “Improving CBR Parameter of Expansive Soil Using the Carbonate Precipitation Method with Tofu Waste as a Biocatalyst”, Civ Eng J, vol. 9, pp. 163–172, Nov. 2023.