NAIKOSOU, Marcelino Freitas et al. Upstream Gas Portfolio Optimization under Fiscal Rules and Uncertainty: A Systematic Review and Bibliometric Mapping. International Journal of Energy Economics and Policy, [S. l.], v. 16, n. 2, p. 914–924, 2026. DOI: 10.32479/ijeep.22235. Disponível em: https://econjournals.com/index.php/ijeep/article/view/22235. Acesso em: 13 feb. 2026.