Roy, Olivier (2007). The new Central Asia. I.B. Tauris. p. 6. ISBN 978-1-84511-552-4. The mass of the Oghuz who crossed the Amu Darya towards the west left the Iranian plateau, which remained Persian, and established themselves more to the west, in Anatolia. Here they divided into Ottomans, who were Sunni and settled, and Turkmens, who were nomads and in part Shiite (or, rather, Alevi). The latter were to keep the name 'Turkmen' for a long time: from the 13th century onwards they 'Turkised' the Iranian populations of Azerbaijan (who spoke west Iranian languages such as Tat, which is still found in residual forms), thus creating a new identity based on Shiism and the use of Turkish. These are the people today known as Azeris.
Bosworth, A. B.; Baynham, E. J. (2002). 《Alexander the Great in Fact and Fiction》. Oxford University Press. 92쪽. ISBN0-19-815287-6. CS1 관리 - 여러 이름 (링크)