Setiawati, M. ., A. . Saggaff, Saloma, and S. P. . Ngian. “Effect of Solution Concentration, Fly Ash Ratio, and Aging Time on the Quality of Nano-Silica”. Science and Technology Indonesia, vol. 10, no. 2, Mar. 2025, pp. 622-7, doi:10.26554/sti.2025.10.2.622-627.