^ abGrupper, S. M. 'A Barulas Family Narrative in the Yuan Shih: Some Neglected Prosopographical and Institutional Sources on Timurid Origins'. Archivum Eurasiae Medii Aevi 8 (1992–94): 11–97
^B.F. Manz, The rise and rule of Tamerlan, Cambridge University Press, Cambridge 1989, p. 28: "... We know definitely that the leading clan of the Barlas tribe traced its origin to Qarachar Barlas, head of one of Chaghadai's regiments ... These then were the most prominent members of the Ulus Chaghadai: the old Mongolian tribes — Barlas, Arlat, Soldus and Jalayir ..."
^M.S. Asimov & C. E. Bosworth, History of Civilizations of Central Asia, UNESCO Regional Office, 1998, ISBN92-3-103467-7, p. 320: "... One of his followers was [...] Timur of the Barlas tribe. This Mongol tribe had settled [...] in the valley of Kashka Darya, intermingling with the Turkish population, adopting their religion (Islam) and gradually giving up its own nomadic ways, like a number of other Mongol tribes in Transoxania ..."