archive
원문 _ https://www.youtube.com/watch?v=8silpYmCyZM
원문 _ https://www.youtube.com/watch?v=n7Z6KyTeouY
원문 _ http://www.asiae.co.kr/news/view.htm?idxno=2018092518542876289
원문 _ https://www.youtube.com/watch?v=3BMZ8PvJZnE
원문 _ http://www.hani.co.kr/arti/culture/book/863061.html
원문 _ https://www.indiepost.co.kr/post/8846
원문 _ https://www.youtube.com/watch?v=Ai7O4FyoYIM
원문 _ https://terms.naver.com/entry.nhn?docId=3577959&cid=59153&categoryId=59153
원문 _ http://www.hani.co.kr/arti/culture/book/858025.html
원문 _ https://www.huffingtonpost.kr/2016/12/14/story_n_13623284.html