Wŏrin chʻŏnʼgang chigok ŭi tʻeksŭtʻŭ punsŏk - Ko, Yŏng-gŭn, 1936-; Pak, Kŭm-ja, 1948-; Ko, Sŏng-hwan, 1962-; Yun, Sŏng-min, 1964- (Tʻeksŭtʻŭ ŏnŏhak chʻongsŏ ;, 2003)