Lada, Adveni Hesty Altisari. “Effect of Fly Ash, Bottom Ash, and Silica Fume As Cement Substitutes on Mortar Compressive Strength”. Cornerstone Civil Engineering Journal, vol. 1, no. 1, Aug. 2026, pp. 57-64, https://ejournal.atkup.ac.id/index.php/ccej/article/view/6.