Yi, Sang-hyŏn (Researcher of Korean language)

• Han'guk kojŏn pŏnyŏkka ŭi ch'osang
• Ilbonin ŭi Han'guk kojŏnhak sŏnjip
• Much'yŏjin Han'guk munhaksa ŭi sagak
• Oegugin ŭi Han'guk siga tamnon yŏn'gu
• Pŏnyŏk kwa hoengdan
• Yumong ch'ŏnja yŏn'gu