SINA, D.; KLLAPI, K. Preferential Trade Agreements. Academic Journal of Interdisciplinary Studies, [S. l.], v. 4, n. 3 S1, p. 436, 2015. Disponível em: https://www.richtmann.org/journal/index.php/ajis/article/view/8415. Acesso em: 27 sep. 2022.