LYPSEY, R. G. Free trade among unequal countries. Estudios Económicos de El Colegio de México, [S. l.], v. 6, n. 1, p. 23–32, 1991. DOI: 10.24201/ee.v6i1.321. Disponível em: https://estudioseconomicos.colmex.mx/index.php/economicos/article/view/321. Acesso em: 3 may. 2024.