T. T. Ngo, M. N. Nguyen, T. N. Ly, T. H. T. Tran, D. D. Nguyen, dan S. Chanatip, “Statistical Analysis of Activation Factors for Coffee Husk derived Activated Carbon on Chromium (VI) Adsorption and Carbon yield ”, vol. 24, no. 2, hlm. 141-155, Agu 2024.