DINH, T. T. B.; NGUYEN, V. D.; HOANG, M. C. Applying gravity model to analyze trade activities of Vietnam. Journal of International Economics and Management, [S. l.], n. 69, p. 3-18, 2014. Disponível em: https://jiem.ftu.edu.vn/index.php/jiem/article/view/117. Acesso em: 20 apr. 2024.