원문 : http://www.mirae-biz.com/news/articleView.html?idxno=18890

원문 : http://go.seoul.co.kr/news/newsView.php?id=20150624017006

원문 : http://www.newsis.com/ar_detail/view.html?ar_id=NISX20150518_0013668412&cID=10702&pID=10700

원문 : http://news1.kr/articles/?2239797