Romsiah, Intan Pebyanti, Ensiwi Munarsih, and Hilma. “The Comparative Analysis of Caffeine in Fermented and Non-Fermented Arabica Coffee Beans”. Sains Natural: Journal of Biology and Chemistry 15, no. 3 (August 29, 2025): 146–153. Accessed October 3, 2025. https://ejournalunb.ac.id/JSN/article/view/879.