MUSTAPHA, Umar M. The Role of Speculation in the Determination of Energy Prices. International Journal of Energy Economics and Policy, [S. l.], v. 2, n. 4, p. 279–291, 2012. Disponível em: https://econjournals.com./index.php/ijeep/article/view/258. Acesso em: 22 nov. 2024.