Hamid Khalaf, Muayed, AND 		Farouk Saleh, Qabas.
" Economic life in Andalusia on the era of the kings of the sects( 422 - 484 AH  1031 - 1091 AD ) historical - analytical study" <em>Journal of Tikrit university for humanities - مجلة جامعة تكريت للعلوم الانسانية</em> [Online], Volume 25 Number 12 (25 March 2019)