Mohamad Izwan Saifudin Bin Mohd Zainuri, Md. Saidin Wahab, Mustaffa Hj Ibrahim, Omar Mohd Faizan Marwah @ Omar, and Nasuha Sa’ude. “Emerging Natural Fiber-Reinforced Cement Materials and Technology for 3D Concrete Printing: A Review”. International Journal of Integrated Engineering 12, no. 3 (February 3, 2020): 161-177. Accessed January 17, 2021. https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/5343.