Khairan K, Musvira I, Lala A, Diah M, Maulana A, Idroes GM, et al. Evaluating Extraction Methods for Caffeine Content in Gayo Arabica Coffee Oil through Gas Chromatography-Mass Spectroscopy. Grimsa J. Sci. Eng. Technol. [Internet]. 2024 Apr. 29 [cited 2026 May 14];2(1):43-51. Available from: https://journals.grimsa.org/index.php/gjset/article/view/31