References
- Hucker, Charles O. (1985). A Dictionary of Official Titles in Imperial China. Stanford University Press. p. 193.
- Duncan, John B. (1998). "The Formation of the Central Aristocracy in Early Koryŏ". Korean Studies . 12: 39–61. doi:10.1353/ks.1988.0003. JSTOR 23717729. S2CID 154332960.
  | This article related to the history of China is a stub. You can help Wikipedia by expanding it. |
 | This Korean history-related article is a stub. You can help Wikipedia by expanding it. |