FULLERTON JR., T. M.; CHARLES SAWYER, W.; SPRINKLE, R. L. Functional form for United States-Mexico trade equations. Estudios Económicos de El Colegio de México, [S. l.], v. 12, n. 1, p. 23–35, 1997. DOI: 10.24201/ee.v12i1.251. Disponível em: https://estudioseconomicos.colmex.mx/index.php/economicos/article/view/251. Acesso em: 28 mar. 2024.