Mousa, Mariam Jumaah, and Mustafa Kamil Rasheed. “Testing the Quality of Forecasting Using the Theils U Statistics for Forecasting the Production Capacity of Crude Oil in Iraq Until 2033”. International Academic Journal of Social Sciences 9, no. 2 (July 4, 2022): 1–7. Accessed October 28, 2026. https://iaiest.com/iaj/index.php/IAJSS/article/view/IAJSS0908.