TRIBOLOGICAL PERFORMANCE OF PALM KERNEL OIL ADDED WITH NANOPARTICLE COPPER OXIDE USING FOURBALL TRIBOTESTER. Jurnal Teknologi (Sciences & Engineering), [S. l.], v. 79, n. 7-4, 2017. DOI: 10.11113/jt.v79.12265. Disponível em: https://journals.utm.my/jurnalteknologi/article/view/12265.. Acesso em: 19 dec. 2024.