CLAVIJO, P.; CAMPO, J.; MENDOZA, H. Threshold effects and unit roots of real commodity prices since the mid-nineteenth century. Economics and Business Letters, [S. l.], v. 9, n. 4, p. 342–349, 2020. DOI: 10.17811/ebl.9.4.2020.342-349. Disponível em: https://reunido.uniovi.es/index.php/EBL/article/view/14455. Acesso em: 6 may. 2024.