“Analisis Kadar Kafein dalam Green Bean dan Roasted Bean Kopi Robusta (Coffea canephora) Temanggung Menggunakan Spektrofotometer UV: Analysis of Caffeine Levels in Green Bean and Roasted Bean of Robusta Coffee (Coffea canephora) Temanggung Using UV Spectrophotometer”, J. Sains. Kes, vol. 4, no. 6, pp. 577–584, Nov. 2024, Accessed: Apr. 19, 2025. [Online]. Available: https://jsk.ff.unmul.ac.id/index.php/JSK/article/view/474