Heriansyah, Pebra, Novian Liwanda, and Waras Nurcholis. 2026. “Optimization of Black Orchid (Coelogyne Pandurata Lindl.) Extraction Using Simplex-Centroid Design for Total Phenolics, Flavonoids, and Antioxidants”. Jurnal Jamu Indonesia 11 (1): 66-71. https://doi.org/10.29244/jji.v11i1.457.