↑Jaguaribe, Hélio (2001). Um estudo crítico da história. 1. São Paulo: Paz e Terra. p. 541
↑Abbas Amanat, The Pivot of the Universe: Nasir Al-Din Shah Qajar and the Iranian Monarchy, 1831-1896, I.B.Tauris, pp 2-3; "In the 126 years between the fall of the Safavid state in 1722 and the accession of Nasir al-Din Shah, the Qajars evolved from a shepherd-warrior tribe with strongholds in northern Iran into a Persian dynasty.."
↑Choueiri, Youssef M., A companion to the history of the Middle East, (Blackwell Ltd., 2005), 231,516.
↑William Bayne Fisher. Cambridge History of Iran, Cambridge University Press, 1993, p. 344, ISBN 0521200946
↑Homa Katouzian, "State and Society in Iran: The Eclipse of the Qajars and the Emergence of the Pahlavis", Published by I.B.Tauris, 2006. pg 327: "In post-Islamic times, the mother-tongue of Iran's rulers was often Turkic, but Persian was almost invariably the cultural and administrative language"