Tokto ŭi Yongsubidae ŭi Tokto chudun hwaryak kwa kŭ kukchepŏpchŏk kochʻalHong-ju Na · First published 2007Open the Tome
Ilbon ŭi "Tokto" yŏngyugwŏn chujang kwa kukchepŏp sang pudangsŏngHong-ju Na · First published 1996Open the Tome
