Judawisastra, Hermawan, and Gunawan Refiadi. “Permanganate Treatment Optimization on Tensile Properties and Water Absorption of Kenaf Fiber-Polypropylene Biocomposites”. International Journal of Automotive and Mechanical Engineering, vol. 19, no. 1, May 2022, pp. 9623-3, doi:10.15282/ijame.19.1.2022.23.0742.