Suraedi, D., J. Sjah, N. Handika, Jonbi, and A. Ashari. “Sustainable Cement Development Using Palm Oil Boiler Ash: Mechanical and Microstructural Evaluation”. Science and Technology Indonesia, vol. 10, no. 4, Oct. 2025, pp. 1188-97, doi:10.26554/sti.2025.10.4.1188-1197.