ALFARISA, S.; SAFITRI, R.N.; DWANDARU, W.S.B. Effect of Catalyst Concentrations on the Growth of Carbon Nanotubes from Waste Engine Oil. EDUCATUM Journal of Science, Mathematics and Technology, [S. l.], v. 3, n. 1, p. 6–12, 2016. Disponível em: https://ejournal.upsi.edu.my/index.php/EJSMT/article/view/39. Acesso em: 13 may. 2025.