Christian, D. A History of Russia, Central Asia and Mongolia, Blackwell Publishing, 1998, Sh.: 141, available online 30 Aralık 2011 tarihinde Wayback Machine sitesinde arşivlendi.
Richard Cowen () The Age of Iron Chapter 5 in a series of essay s on Geology, History, and People prepares for a course of the University of California at Davis. Online version 14 Mart 2010 tarihinde Wayback Machine sitesinde arşivlendi..
Richard Cowen () The Age of Iron Chapter 5 in a series of essay s on Geology, History, and People prepares for a course of the University of California at Davis. Online version 14 Mart 2010 tarihinde Wayback Machine sitesinde arşivlendi..
William Foxwell Albright, ‘’The archaeology of Palestine’’ [4] 8 Mart 2016 tarihinde Wayback Machine sitesinde arşivlendi. Sh.: 110
Christian, D. A History of Russia, Central Asia and Mongolia, Blackwell Publishing, 1998, Sh.: 141, available online 30 Aralık 2011 tarihinde Wayback Machine sitesinde arşivlendi.