Sharifah Nur Athirah Binti Wan Abiddin and Norfaniza Binti Mokhtar, “Study on a Coconut Shell as an Additive in a Concrete MIx”, rtcebe, vol. 3, no. 1, pp. 49–56, Jun. 2022, Accessed: Apr. 10, 2026. [Online]. Available: https://penerbit.uthm.edu.my/periodicals/index.php/rtcebe/article/view/4009