Alya Aprilianti, Yossy Yopinka, Muhammad Ikhsan Adhi Prabowo, & Zainal Arifin. (2025). From Farm to Cup: Upstream–Downstream Integration and Supply Chain Performance in Indonesia’s Coffee Industry. International Journal of Global Optimization and Its Application, 4(2), e513. https://doi.org/10.56225/ijgoia.v4i2.513