"류천궁 柳天弓". CultureContent (in Korean). Retrieved August 20, 2021.
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Kim Kap-dong (2009). 高麗 太祖妃 神惠王后와 貞州 柳氏 [The wife of Wang Geon of Goryeo, Queen Sinhye and Chŏngju Yu clan Issue 11] (in Korean and Chinese). Korean History Research. pp. 119–155. ISSN1738-3307.
Kim Kap-dong (2009). 高麗 太祖妃 神惠王后와 貞州 柳氏 [The wife of Wang Geon of Goryeo, Queen Sinhye and Chŏngju Yu clan Issue 11] (in Korean and Chinese). Korean History Research. pp. 119–155. ISSN1738-3307.