"Using Some Methods Estimation of Hybrid Model For Unbalanced Panel Data : Simulation Study" (2026) Al Kut Journal of Economics and Administrative Sciences, 18(62), ص 1380–1402. موجود في: https://kjeas.uowasit.edu.iq/index.php/kjeas/article/view/1306 (تاريخ الوصول: 26 أغسطس 2026).