Tang L. A History of Uighur Religious Conversions (5th - 16th Centuries)

Asia Research Institute. Working Paper Series. No. 44, June 2005, Singapore. - P. 81The significance of the Uighur presence in history, especially during the Tang period, is reflected in the ample information on them recorded in Chinese historical sources. Apart from Chinese records, Arab, Persian and European medieval sources also give references to the Uighur of the later period, which corresponds to the Chinese sources of the Yuan Dynasty (1279-1368). Sources in the Uighur language are also available, but for the most part, preserved only in fragmentary manuscripts and inscriptions.