user22, user2, 		Yassin1, Dr. Jamaa, AND 		Adnan Baker2, Dr. Qahtan.
" Loss of Sultan Lands in the era of Buhay (332-445 AH): A historical Economic study" <em>Journal of Tikrit university for humanities - مجلة جامعة تكريت للعلوم الانسانية</em> [Online], Volume 23 Number 3 (30 March 2019)