Han'guk chŏnt'ong parhyo ch'a ŭi saengsan pangsik kwa sobi hyŏngt'ae Hadong-gun Agyang chiyŏk hongch'a rŭl chungsim ŭro - Chang, Hyo-ŭn (Hagyŏn Munhwasa, 2016)
Based on the author's thesis (doctoral)--Wŏn'gwang Taehakkyo, 2012