Nordin, M. N. A., K. Sakamoto, H. Azhari, K. Goda, M. Okamoto, H. Ito, and T. Endo. “Tensile and Impact Properties of Pulverized Oil Palm Fiber Reinforced Polypropylene Composites : A Comparison Study With Wood Fiber Reinforced Polypropylene Composites”. Journal of Mechanical Engineering and Sciences, vol. 12, no. 4, Dec. 2018, pp. 4191-02, doi:10.15282/jmes.12.4.2018.15.0361.