Daniel T. Potts. Nomadism in Iran: From Antiquity to the Modern Era. 2014: 7. Indeed, the Bayundur clan to which the Aq-qoyunlu rulers belonged, bore the same name and tamgha (symbol) as that of an Oghuz clan.
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Minorsky, Vladimir. The Aq-qoyunlu and Land Reforms (Turkmenica, 11). Bulletin of the School of Oriental and African Studies, University of London. 1955, 17 (3): 449. doi:10.1017/S0041977X00112376.
