Hamad, Alwani, Dwi Nugraheni, Bekti Wulan Sari, and Mubshair Naveed. “Decaffeination of Coffee Bean Using Fermentation Process: Effect of Starter Concentration and Varieties on The Reduction of Caffeine and Antioxidant Activity”. Research in Chemical Engineering 2, no. 2 (November 26, 2023): 57–62. Accessed July 5, 2026. http://ejournal.ump.ac.id/index.php/rice/article/view/85.