Ebrey & Walthall 2014Lỗi harv: không có mục tiêu: CITEREFEbreyWalthall2014 (trợ giúp), [1], tr. 179, tại Google Books. "The Mongols made sure the Korean kings knew who was in charge. Mongol emperors deposed Goryeo kings who failed to serve their interests in 1298, 1313, 1321, 1330, 1332, 1343, and 1351. Some kings were held in detention in Dadu (Beijing) to issue decrees in absentia. Insult was added to injury in 1343 when Mongol envoys arrested the Korean king for initiating reforms detrimental to Mongol interests. They kicked him around, tied him up, and exiled him to China, but he died on the way".
ctext.org
Jeong In-ji (1451). 高麗史 [History of Goryeo] (bằng tiếng Trung). 36.