A. N. Izza, C. R. . Lestari, and U. . Hidayat , Trans., “Differences in Sugar Concentration on Flavonoid Levels in Roselle Kombucha (Hibiscus sabdariffa L.) As An Antioxidant Beverage”, JBSH, vol. 3, no. 1, pp. 70–76, Feb. 2026, doi: 10.34310/jbsh.v3.i1.308.