http://www.dt.co.kr/contents.html?article_no=2013122602010351786002

http://www.dt.co.kr/contents.html?article_no=2013122602010960718001

http://news.donga.com/3/all/20131226/59784411/1

http://biz.newdaily.co.kr/news/article.html?no=10028110

http://www.wikitree.co.kr/main/news_view.php?id=152476

http://news.chosun.com/site/data/html_dir/2013/12/23/2013122302181.html

http://www.ciokorea.com/news/19408

http://www.ajunews.com/view/20131223145008368

http://news.khan.co.kr/kh_news/khan_art_view.html?artid=201312231229302&code=900303

http://www.etnews.com/news/contents/internet/2890179_1488.html