"The impact of the Russian-Ukrainian crisis on the volume of cash flows of oil-exporting countries (in OPEC) A comparative study of the Iraqi Sumo Company". Al Kut Journal of Economics and Administrative Sciences 14, no. 45 (ديسمبر 14, 2022). تاريخ الوصول سبتمبر 21, 2026. https://kjeas.uowasit.edu.iq/index.php/kjeas/article/view/479.