M. Hatidja, B. J. Kepel, F. D. Budiarso, A. E. Manampiring, and F. Fatimawali, “In Vitro Antioxidant Activity Test of Brown Algae (Sargassum polycystum) Ethanol Extract Using the DPPH Method”, JIS, vol. 26, no. 2, pp. 176–188, Oct. 2026, doi: 10.35799/jis.v26i2.65519.