Shafii, Mohd Amin, Praveen Raj Durai, Nuryantizpura Mohamad Rais, and Amminudin Ab. Latif. “Modification of HMA Using Palm Oil Boiler Ash As a Filler”.
International Journal of Engineering and Technology 7, no. 4 (September 5, 2018): 3245–3248. Accessed April 1, 2025.
https://sciencepubco.com/index.php/IJET/article/view/21572.