H. Judawisastra and G. Refiadi, “Permanganate Treatment Optimization on Tensile Properties and Water Absorption of Kenaf Fiber-Polypropylene Biocomposites”, Int. J. Automot. Mech. Eng., vol. 19, no. 1, pp. 9623–9633, May 2022, doi: 10.15282/ijame.19.1.2022.23.0742.