Naikosou, M. F., Adityawarman, A., Guterres, M. V., Mota, T. M., Samawi, N. V., Ariadji, T., … Saldanha, E. de S. (2026). Upstream Gas Portfolio Optimization under Fiscal Rules and Uncertainty: A Systematic Review and Bibliometric Mapping. International Journal of Energy Economics and Policy, 16(2), 914–924. https://doi.org/10.32479/ijeep.22235