Tandi, J. ., 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”. Jurnal Akademika Kimia, vol. 12, no. 1, July 2024, pp. 58-64, doi:10.22487/j24775185.2023.v12.i1.pp58-64.