Sallam, Mohamed A. M., and Tarek Sadraoui. “Studying the Relationship Between CO2 Emissions and Renewable Energy: A Threshold ARDL and NARDL Panel Econometric Analysis”. International Journal of Energy Economics and Policy, vol. 16, no. 1, Dec. 2025, pp. 507-15, doi:10.32479/ijeep.21457.