Ancient Coin Collecting VI: Non-Classical Cultures, by Wayne G. Sayles p.81[ölü/kırık bağlantı]
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Jiu Tangshu vol 194 upper [1] 18 Ekim 2020 tarihinde Wayback Machine sitesinde arşivlendi. "可汗者,猶古之單于;[...] 其子弟謂之特[勤] (ms. 特勒)" Tr. "the Kehan, in the past, was called Chanyu: [...] His sons and younger brothers are called Te[qin] (ms. Tele)"(in Chinese)
Xin Tangshu Vol. 215 upper [2] 14 Haziran 2019 tarihinde Wayback Machine sitesinde arşivlendi. (in Chinese) "至吐門,遂強大,更號可汗,猶單於也,[..] 子弟曰特[勤] (ms. 特勒)" tr. "Till Tumen, [who] has achieved strength and greatness and is now called Kehan, formerly Chanyu, [...] [his] sons and younger brothers are called Te[qin] (ms. Tele)
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Jiu Tangshu vol 194 upper [1] 18 Ekim 2020 tarihinde Wayback Machine sitesinde arşivlendi. "可汗者,猶古之單于;[...] 其子弟謂之特[勤] (ms. 特勒)" Tr. "the Kehan, in the past, was called Chanyu: [...] His sons and younger brothers are called Te[qin] (ms. Tele)"(in Chinese)
Xin Tangshu Vol. 215 upper [2] 14 Haziran 2019 tarihinde Wayback Machine sitesinde arşivlendi. (in Chinese) "至吐門,遂強大,更號可汗,猶單於也,[..] 子弟曰特[勤] (ms. 特勒)" tr. "Till Tumen, [who] has achieved strength and greatness and is now called Kehan, formerly Chanyu, [...] [his] sons and younger brothers are called Te[qin] (ms. Tele)