^Philippe, Beaujard (2019). "Western Asia: Revival of the Persian Gulf". The Worlds of the Indian Ocean. Cambridge University Press. pp. 515–521. ISBN9781108341219. "In a state of demographic stagnation or downturn, the region was an easy prey for nomadic Turkmen. The Turkmen, however, never managed to build strong states, owing to a lack of sedentary populations (Martinez-Gros 2009: 643). When Tamerlane died in 1405, the Jalāyerid sultan Ahmad, who had fled Iraq, came back to Baghdad. Five years later, he died in Tabriz (1410) in a battle led against the Turkmen Kara Koyunlu (“[Those of the] Black Sheep”), who took Baghdad in 1412."
^"Kara Koyunlu". Encyclopaedia Britannica. "Kara Koyunlu, also spelled Qara Qoyunlu, Turkish Karakoyunlular, English Black Sheep, Turkmen tribal federation that ruled Azerbaijan, Armenia, and Iraq from about 1375 to 1468."
^The Book of Dede Korkut (F.Sumer, A.Uysal, W.Walker ed.). University of Texas Press. 1972. p. Introduction. ISBN0-292-70787-8. "Better known as Turkomans... the interim Ak-Koyunlu and Karakoyunlu dynasties..."