[1]
Anik Eko Novitasari and Nikmatul Fitriyah, “Effect of Extraction and Centrifugation on Caffeine Levels in Urine of Robusta Coffee Drinkers Using the Method of Uv-Vis Spectrophotometry”, IJHESS, vol. 7, no. 1, p. 219~225, Jan. 2025.