Khairul Nur Ihfansyah, and Mochamad Teguh. “Effect of Coconut Shell Ash Substitution on Compressive Strength, Wear Resistance and Water Absorption in Paving Blocks”. Teknisia, vol. 29, no. 1, Sept. 2024, pp. 37-46, https://journal.uii.ac.id/teknisia/article/view/36067.