Wŏn-ho Ha

• Hanmal Ilche ha Naju chiyŏk ŭi sahoe pyŏndong yŏnʼgu
• Hanʾguk kŭndae kyŏngjesa yŏnʾgu
• Kaehang ihŭ Ilche ŭi chʻimnyak
• Kaehanggi ŭi chaehan oeguk konggwan yŏnʼgu