Morphological Analysis of Bottle Cap and Face Mask as Composite Materials. International Journal Of Technical Vocational And Engineering Technology, [S. l.], v. 4, n. 1, p. 18–23, 2023. Disponível em: https://journal.pktm.com.my/index.php/ijtvet/article/view/97. Acesso em: 3 apr. 2025.