Alfarisa, S., Safitri, R., & 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), 6-12.
https://ejournal.upsi.edu.my/index.php/EJSMT/article/view/39