https://www.ibulgyo.com/news/articleView.html?idxno=92263

https://dh.aks.ac.kr/~biguni/wiki/index.php/%EA%B8%88%EB%B4%89%EB%B3%91%EC%97%B0(%E9%8C%A6%E5%B3%B0%E7%A7%89%E6%BC%94)

https://www.ibulgyo.com/news/articleView.html?idxno=81402

https://encykorea.aks.ac.kr/Article/E0052618