Yi, Ki-jun.

• Hanmal Sŏgu kyŏngjehak toipsa yŏnʼgu
• Hanʼguk kyŏngjehak kyoyuksa yŏnʼgu
• Hanʼguk kyŏngjehak nonjŏ chʻongnam
• Illŭn kŏt i tŏ manhŭlchirado
• Kyoyuk Hanʼguk kyŏngjehak paltalsa