J. . Tandi, N. P. I. Riani, T. W. Handayani, and M. . Kanan, “Determination of Secondary Metabolites and Antioxidant Activity of Robusta Coffee Bean Ethanol Extract by UV-Vis Spectrophotometry”, J. Akademika Kimia, vol. 12, no. 1, pp. 58-64, Jul. 2024.