SAYIDA, I.; ABDULLAH, K. The economic factor and its effect of the authority system: The Kurdish emirates during the Abbasid era as an example. Which is analyzed per Ebn Khaldon theory. Humanities Journal of University of Zakho, [S. l.], v. 11, n. 3, p. 714–723, 2023. DOI: 10.26436/hjuoz.2023.11.3.1173. Disponível em: https://hjuoz.uoz.edu.krd/index.php/hum/article/view/1173. Acesso em: 3 jul. 2024.