http://news.khan.co.kr/kh_news/khan_art_view.html?artid=200609190812091&code=910100
http://www.ohmynews.com/NWS_Web/View/at_pg.aspx?CNTN_CD=A0000360394
http://www.hani.co.kr/arti/economy/economy_general/158048.html
http://news.naver.com/main/read.nhn?mode=LSD&mid=sec&sid1=001&oid=214&aid=0000017930&