Lee, Jae-won (17 February 2014). "법원 "'적기가' 부른 이석기 국보법 위반"…'적기가' 뭔지 보니" [Court rules 'The Red Flag' song a violation of the Korean National Security Law...I see what 'The Red Flag' song is] (in Korean). Money Today. Archived from the original on 27 February 2018. Retrieved 17 June 2018.
"Chapter 2". www.w3.org. Retrieved 27 August 2022.
web.archive.org
Lee, Jae-won (17 February 2014). "법원 "'적기가' 부른 이석기 국보법 위반"…'적기가' 뭔지 보니" [Court rules 'The Red Flag' song a violation of the Korean National Security Law...I see what 'The Red Flag' song is] (in Korean). Money Today. Archived from the original on 27 February 2018. Retrieved 17 June 2018.