Alfarisa S, Safitri R, Dwandaru W. Effect of Catalyst Concentrations on the Growth of Carbon Nanotubes from Waste Engine Oil. EJSMT [Internet]. 2016 Jun. 3 [cited 2024 Apr. 28];3(1):6-12. Available from: https://ojs.upsi.edu.my/index.php/EJSMT/article/view/39