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|Burrowes Historical Dictionary of Yemen p||Scott Fitzgerald Johnson The Oxford Handbook of Late Antiquity p|
Yemen's Democracy Experiment in Regional Perspective.
|April 2015, archiviert vom am 26||Day Regionalism and Rebellion in Yemen: A Troubled National Union p|
|53-65 Published by: Islamic Research Institute, International Islamic University, Islamabad• Korotaev Pre-Islamic Yemen: Socio-political Organization of the Sabaean Cultural Area in the 2nd and 3rd Centuries AD p||Pranger Ideology and Power in the Middle East: Studies in Honor of George Lenczowski p|
Nadav Safran Saudi Arabia: The Ceaseless Quest for Security p.11