Trade Effects of the Generalized System of Preferences . The Pakistan Development Review, [S. l.], v. 15, n. 1, p. pp.64–89, 1976. DOI: 10.30541/v15i1pp.64-89. Disponível em: https://thepdr.pk/index.php/pdr/article/view/407. Acesso em: 25 oct. 2025.