Ko Pyŏng-ik, Yi Ki-baek ŭi hangmun kwa yŏksa yŏnʼguHallim Taehakkyo (Korea). Hallim Kwahagwŏn · First published 2007Open the Tome
Hanguk kodae chongchi sahoesa yongu (Yi Ki-baek Hanguk sahak nonjip)Yi, Ki-baek. · First published 1996Open the Tome