D. Bachtiar, J. P. Siregar, Suhaeri, Masri, and Zulfadhli, “Fatigue Performance of Sugar Palm Fibre-Reinforced Thermoplastic Polyurethane Composites with Varying Fibre Content”, jes, vol. 4, no. 1, pp. 48–55, Jun. 2025, doi: 10.56347/jes.v4i1.267.