Mohd Sari, K. A., Mat, S., Badri, K. and M. Sani, A. R. (2014) “Properties of Structural Lightweight Concrete Filled with Palm-Based Polyurethane”, International Journal of Integrated Engineering, 6(1). Available at: https://penerbit.uthm.edu.my/ojs/index.php/ijie/article/view/881 (Accessed: 26 June 2022).