MIGHRI, Z. A.; AL SAGGAF, M. I. Gold - Silver Nexus: A Threshold Cointegration Approach. International Journal of Economics and Financial Issues, [S. l.], v. 8, n. 5, p. 210–219, 2018. Disponível em: https://econjournals.com/index.php/ijefi/article/view/6838. Acesso em: 27 apr. 2024.