Alfarisa, S., Safitri, R. and Dwandaru, W. (2016) “Effect of Catalyst Concentrations on the Growth of Carbon Nanotubes from Waste Engine Oil”, EDUCATUM Journal of Science, Mathematics and Technology, 3(1), pp. 6–12. Available at: https://ojs.upsi.edu.my/index.php/EJSMT/article/view/39 (Accessed: 27 April 2024).