N. S. Elyas Alqahawage, نزار, A. W. Mahdi Al-Neama, and علاء, “Air pollution and economic development, a tested an Environmental Kuznets Curve Hypothesis for some countries, with a special mentioned to Iraq for the period (1990-2020)”, RSJ, vol. 18, no. 61, pp. 289–322, Jun. 2025.