Nugroho, Soewignjo A., S. P. Retno Wardani, A. S. Muntohar, and Syawal Satibi. “Effect of Coal Combustion Waste on Cement-Treated Clay”. Civil Engineering Journal 10, no. 11 (November 1, 2024): 3603–3612. Accessed September 21, 2025. https://www.civilejournal.org/index.php/cej/article/view/4818.