Phan Thị Thúy, and Lê Thị Hoàng Oanh. “Does Sustainability Certification Improve Productivity or Expand Production Scale? Evidence from Certified Coffee Systems in Vietnam’s Central Highlands”. Tay Nguyen Journal of Sciences 20, no. 3 (June 30, 2026): 93–101. Accessed August 12, 2026. https://tnjos.vn/index.php/tckh/article/view/738.