DERBALI, A.; WU, S.; JAMEL, L. OPEC news and predictability of energy futures returns and volatility: evidence from a conditional quantile regression. Journal of Economics, Finance and Administrative Science, [S. l.], v. 25, n. 50, p. 239–259, 2020. Disponível em: https://revistas.esan.edu.pe/index.php/jefas/article/view/42. Acesso em: 23 nov. 2024.