Yi, Hag-yong.

• Kukche kyŏngjaengnyŏk kwa Hanʼgugin ŭi ŭisik kujo
• Kyŏngje, kyŏngyŏng suhak
• Kyŏngjehak wŏllon
• Kyŏngje suhak
• Misi kyŏngje iron