R. Al-Ramli, Abdullah M., and Saif Ali Yahya Hassan. “Measuring and Analyzing the Elements of Total Injection in the Iraqi Economy for the Period (1990-2018)”. Tikrit Journal of Administrative and Economic Sciences, vol. 17, no. 53, 2, Mar. 2021, pp. 255-7, doi:10.25130/tjaes.17.53.2.15.