Han'guk ŭi pin'gon kwa pulp'yŏngdŭng Han'guk sahoe ŭi minjuhwa wa kwallyŏn hayŏ - Yun, To-hyŏn; Kim, Sŏng-hŭi; Kim, Chong-hun (Minjuhwa undong yŏn'gu ch'ongsŏ Inyŏm.chŏngch'aek p'yŏn, 2005)