《资治通鉴·陈纪·陈纪二》
高湛再三逼他说出来。高元海这才说： 济南王是先帝的嫡子，主上假托太后的命令夺了他的帝位。
固逼之，元海曰： 济南世嫡，主上假太后令而夺之。
Gao Zhan repeatedly forced him to tell. Only then did Gao Yuanhai state: The King of Jinan is the true heir of the last Emperor. The present Emperor has falsely claimed his imperial seat on the orders of the Empress Dowager.