Abdul Manaf, Adib Fikri, et al. “Effect on Thermal Conductivity of Concrete Containing Recycled Polyethylene Terephthalate (PET)”. International Journal of Sustainable Construction Engineering and Technology, vol. 15, no. 3, Dec. 2024, pp. 157-6, https://penerbit.uthm.edu.my/ojs/index.php/IJSCET/article/view/17031.