DEVELOPMENT OF CUTTING FLUID FROM SPENT ENGINE OIL. Nigerian Journal of Technology, [S. l.], v. 37, n. 4, p. 950–956, 2018. DOI: 10.4314/njt.374.1856. Disponível em: https://nijotech.com/index.php/nijotech/article/view/1856. Acesso em: 16 apr. 2026.