«대일본 천황이 조서를 내리다». Veritable Records of the Joseon dynasty. Besøkt 9. juli 2020.
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«英親王垠을 皇太子로 封함». Besøkt 8. juli 2020. «朝野皆知新皇帝不慧，且無嗣屬望，……嚴貴妃方專寵，欲貴其子，厚賂博文，冀得其力；義親王堈，年雖長，多失儀、無人望，且孤立援少……由是衆議自歸於垠，援定宗朝故事，立爲皇太子。 (The people by the time knew that the new emperor was not exactly smart and there's no hope for him to produce an heir,... Lady Eom, the Imperial Noble Consort just gained much love from the Emperor [Emeritus] and she wanted to promote her son's position, so she bribed Itō Hirobumi for his support; the Prince Imperial Ui, despite being elder, had many scandals and lost reputation, making him lack to support... and so, people eventually agreed to make Yi Un the crown prince, following the precedent from King Jeongjong of Joseon.)»
