Jasim AL Kobisi, T. H., and B. M. Ibrahim AL Karbuly. “Tribal Structure in Andalusia and Its Impact in the Creation of the Umayyad Emirate (138 Ah/755 AD)”. Journal of Tikrit University for Humanities, vol. 28, no. 12, 2, Dec. 2021, pp. 313-26, doi:10.25130/jtuh.28.12.2.2021.15.