SASRIA, N. Composite Manufacturing of Coir Fiber-Reinforced Polyester as a Motorcycle Helmet Material. JMPM (Jurnal Material dan Proses Manufaktur), [S. l.], v. 6, n. 1, p. 48–56, 2022. DOI: 10.18196/jmpm.v6i1.13756. Disponível em: https://journal.umy.ac.id/index.php/jmpm/article/view/13756. Acesso em: 29 apr. 2025.