Madu, Ludiro, and Erna Kurniawati. “Economic Diplomacy Strategies to Increase Indonesian Coffee Exports to Russia in Pandemic Times”. RSF Conference Series: Business, Management and Social Sciences 1, no. 4 (October 22, 2021): 92–97. Accessed October 1, 2025. https://proceeding.researchsynergypress.com/index.php/rsfconferenceseries1/article/view/311.