Bakar, M.A.A., and Zahiraniza Mustaffa. 2020. “Quasi-Static Indentation of Reinforced Thermoplastic Pipe (RTP)”. International Journal of Sustainable Construction Engineering and Technology 11 (1): 53-63. https://penerbit.uthm.edu.my/ojs/index.php/IJSCET/article/view/6226.