OTHMAN, N.; YUSOP, Z.; ISMAIL, M. M.; AFANDI, S. H. M. Energy Tax and the Downstream Palm Oil Trade Competitiveness Nexus in Malaysia: An Application of GMM Approach. International Journal of Energy Economics and Policy, [S. l.], v. 11, n. 5, p. 593–599, 2021. Disponível em: https://econjournals.com/index.php/ijeep/article/view/11558. Acesso em: 1 feb. 2023.