Alawd, Ayman Abdelghani Hamza, and Kumait Saeed Awad. “With the Impact of the Corona Pa Ndemic (Covid-19) on the Global Economy by Focusing on the Sudanese Economy (2019-2021)”. Tikrit Journal of Administrative and Economic Sciences, vol. 18, no. 57, 3, Mar. 2022, pp. 347-61, doi:10.25130/tjaes.18.57.3.21.