Analysis of information sources in references of the Wikipedia article "Ак-Коюнлу" in Russian language version.
The disintegration of Timur's empire into a growing number of Timurid principalities ruled by his sons and grandsons allowed the remarkable rebound of the Ottomans and their westward conquest of Byzantium as well as the rise of rival Turko-Mongolian nomadic empires of the Aq Qoyunlu and Qara Qoyunlu in western Iran, Iraq, and eastern Anatolia. In all of these nomadic empires, however, Persian remained the official court language and the Persianate ideal of kingship prevailed.
Among the Azeri poets of the 15th century mention should be made of Ḵaṭāʾi Tabrizi. He wrote a maṯnawi entitled Yusof wa Zoleyḵā, and dedicated it to the Aqqoyunlu Sultan Yaʿqub (r. 1478–90), who himself wrote poetry in Azeri Turkish.
