BUBERKOKU, O. Examining Energy Futures Market Efficiency Under Multiple Regime Shifts. International Journal of Energy Economics and Policy, [S. l.], v. 7, n. 6, p. 61–71, 2017. Disponível em: https://econjournals.com/index.php/ijeep/article/view/5578. Acesso em: 4 may. 2024.