Konggong pŏbin kwallyŏn pŏpche ŭi chŏngbi mit kaesŏn pangan yŏn'guChun-u Yi · First published 2007Open the Tome
Disŭpʻŭllei pupʻum, sojae sanŏp ŭi hyŏnhwang mit kyŏngjaengnyŏk punsŏkChun-u Yi · First published 2005Open the Tome