Anggraini AP, Fildzah Arifah M, Sayyidah Yahya FU, Nurhasanah D. The Effect of Extraction Time Variation on Caffeine Content in Robusta Coffee Extract using Ultrasound-Assisted Extraction Method. J. Food Pharm. Sci [Internet]. 2025Mar.30 [cited 2025Apr.3];13(1):76-. Available from: https://jurnal.ugm.ac.id/v3/JFPS/article/view/18750