“Effect of Addition Palm Oil Fuel Ash Silica in Agropolimer Concrete”. ALKIMIA : Jurnal Ilmu Kimia dan Terapan 5, no. 2 (February 28, 2022): 166–172. Accessed April 3, 2025. https://jurnal.radenfatah.ac.id/index.php/alkimia/article/view/7138.