Hyŏng-tʻae Yi

• Chogyŏng kyehoek ŭl wihan chŏ kurŭngji ŭi paesu pʻaetʻŏn pyŏl tʻoyang tʻŭksŏng ŭi chosa pullyu e kwanhan yŏnʼgu
• Chosŏn tongŭiŏ sajŏn
• Tongŭiŏ, panŭiŏ, tongŭmŏ sajŏn