MHD SHUKRI, Nur Syazwani ilyana; MOHAMAD ZAKY NOH. Effect of Palm Oil Fuel Ash Treated with Citric Acid to Physico-Mechanical Properties of Cement Paste. Enhanced Knowledge in Sciences and Technology, [S. l.], v. 4, n. 2, p. 378–386, 2024. Disponível em: https://publisher.uthm.edu.my/periodicals/index.php/ekst/article/view/14347. Acesso em: 9 apr. 2026.