R. Hidayati, S. Murtia, Gendis Purno Yudanti, and Gunawan Firmansyah, “Variation of TEA and Stearic Acid Concentration in Robusta Coffee Bean Powder (Coffea Canephora L) Body Scrub Formulation and Irritation Test”, PCICHT, vol. 3, pp. 275–280, Jul. 2025.