Haksaengdŭl ŭn suŏp sigan e wae chilmun haji annŭn'ga?Ch'ŏng-il Hwang · First published 2020Open the Tome
Oyŏm tʻoyang puji ŭi chŏngbo kwalli chʻegye hyoyurhwa panganSang-il Hwang · First published 2004Open the Tome
IBM ui Hangukchok chongbo chollyak kyehoek surip pangbomnonChae-il Hwang · First published 1997Open the Tome