A. A. Styawan and Atun Yuliana, “Comparison of Tannin Levels in Brewed and Boiled Green Tea (Camellia Sinensis (L.) Kuntze) by UV-Vis Spectrophotometric Method”, ad-dawaa.j.pharm.sci, vol. 7, no. 2, pp. 103-108, Nov. 2024.