Chin-sik Yu

• Chonja somyongpopsang ui injung chedo e kwanhan yongu (Yongu pogo)
• Chŏnja sŏmyŏngpŏpsang ŭi injŭng chedo e kwanhan yŏnʼgu
• Sikp'um, wisaeng chŏngch'aek, pŏpche chŏnghapsŏng yŏn'gu