[1]
M. R. Marjoni, S. E. . Trijuanda, and N. P. . Evani, “Analysis of tannin and catechin levels in ethyl acetate extract of gambir twigs (Uncaria gambir Roxb.) using UV-Vis spectrophotometry ”, midwifery, vol. 13, no. 3, pp. 735–744, Jul. 2025.