Mhd Shukri NS ilyana, Mohamad Zaky Noh. Effect of Palm Oil Fuel Ash Treated with Citric Acid to Physico-Mechanical Properties of Cement Paste. EKST [Internet]. 2024 Dec. 17 [cited 2026 Apr. 9];4(2):378-86. Available from: https://publisher.uthm.edu.my/periodicals/index.php/ekst/article/view/14347