KANKAM, D.; ACKAH, I. The Optimal Petroleum Fiscal Regime for Ghana: An Analysis of Available Alternatives. International Journal of Energy Economics and Policy, [S. l.], v. 4, n. 3, p. 400–410, 2014. Disponível em: https://econjournals.com/index.php/ijeep/article/view/817. Acesso em: 6 may. 2024.