Nurudin, Arif, Prantasi Harmi Tjahjanti, and Anton Setyawan. “Making Composite Materials from Unsaturated Polyester and Coconut Fiber Judging from Mechanical Properties”. Jurnal Improsci 1, no. 4 (February 16, 2024): 213–221. Accessed May 26, 2026. https://annpublisher.org/ojs/index.php/improsci/article/view/185.