NAWWAF, Z. K. The Emergence of the position of Prince of Princes and Its Impact on the Authority of the Caliphate and the Ministry: Muhammad bin Raiq and Caliph al-Radi as a Model. Journal of Tikrit University for Humanities, [S. l.], v. 27, n. 4, p. 235–252, 2020. DOI: 10.25130/jtuh.27.4.2020.12. Disponível em: https://jtuh.org/index.php/jtuh/article/view/1125. Acesso em: 25 jun. 2026.