Ŭn-suk Ko

• Hanil yanggugŏ hyŏngyongsa yŏn'gu
• Kugŏ ŭimunpŏp ŏmi ŭi yŏksajŏk pyŏnch'ŏn
• Kugŏ ŭimunpŏp ŏmi ŭi yŏksajŏk yŏn'gu