user22, user2, 		Yassin, Dr.. Hamza, AND 		Dawood, M. Diedar.
" The relationship between the Ayyubids and Zaydis in Yemen (569 e-626 e / 1174-1228)" <em>Journal of Tikrit university for humanities - مجلة جامعة تكريت للعلوم الانسانية</em> [Online], Volume 24 Number 9 (31 March 2019)