Azlan, Nurul Isnani, Amalina Hanani Ismail, and Andri Kusbiantoro. 2022. “Strength Development of Geopolymer Concrete Containing Palm Oil Clinker Powder”. Progress in Engineering Application and Technology 3 (1): 351-58. https://publisher.uthm.edu.my/periodicals/index.php/peat/article/view/6276.