“The Surge in Indonesian Robusta Coffee Price: The Interaction of Substitute Commodity Prices and Exchange Rates on Robusta Price Behavior” (2025) Pelita Perkebunan (a Coffee and Cocoa Research Journal), 41(3). Available at: https://mail.ccrjournal.com/index.php/ccrj/article/view/693 (Accessed: 1 May 2026).