Jafaar, M. . R., and A. M. . Al-Ethary. “Gravity Models Estimation for Saudi Arabia Kingdom Export to Iraq and From Iraq Export to Saudi Arabia Kingdom (My Country Has Oil resources): (An Econometrics Study for Period 1990-2020)”. Journal of Ecohumanism, vol. 3, no. 4, Aug. 2024, pp. 2082-08, doi:10.62754/joe.v3i4.3742.