Muhamad Ikmal Haqeem Lokman, Mohamad Hairi Osman, and Mohd Eizzuddin Mahyeddin. 2022. “A Stress and Strain Relationship for Cylinder Concrete Containing Palm Oil Fuel Ash (POFA) and Expanded Polystyrene (EPS)”. Progress in Engineering Application and Technology 3 (1): 279-88. https://publisher.uthm.edu.my/periodicals/index.php/peat/article/view/6242.