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King, Geoffrey and Tonghini, C. (1996) Reconnaissance Survey of Islamic Sites near Aden and in the Abyan District of Yemen. London: SOAS University of London.
Kennedy, Hugh (2011) 'Shayzar: overview of its history.' In: Tonghini, C., (ed.), Shayzar I: The Fortification of the Citadel. Leiden: Brill, pp. 2-25.