Valery Allen, R., & Syahfitra, M. (2026). Analisis Komparatif Efisiensi Rendemen Dan Stabilitas Kadar Katekin Ekstrak Gambir (Uncaria Gambir) Menggunanakan Pengepres Hidrolik Dan Pengepres Ulir Skala Industri Kecil: Comparative Analysis of Yield Efficiency and Stability of Catechin Content of Gambir (Uncaria Gambir) Extract Using Hydraulic Press and Screw Press on Small Industrial Scale. Atech-i, 3(1), 38–47. https://doi.org/10.55043/atech-i.v3i1.50