Lestari, Lilla Puji. “Analysis of Caffeine, Total Phenolic Content, and Antioxidant Activity in Liberica Coffee Beans Roasted by Semi-Automatic and Conventional Methods ”. Indonesian Journal of Chemistry and Environment 8, no. 1 (October 4, 2025): 1–8. Accessed October 7, 2025. https://journal.uny.ac.id/index.php/ijoce/article/view/85978.