Nhung, Nguyễn Hồng, Nguyễn Việt Phong, Nguyễn Quang Thái, and Bùi Trinh. “Analyzing the Northern Key Economic Region of Vietnam and Rest of Vietnam Based on Interregional Input - Output Model”. International Journal of Economics, Business and Management Studies 6, no. 1 (August 26, 2019): 235–246. Accessed May 2, 2024. https://onlinesciencepublishing.com/index.php/ijebms/article/view/238.