출처 : 중앙일보 https://news.joins.com/article/23661275
매일경제 https://www.mk.co.kr/news/business/view/2019/12/1066638/?a=1
헤럴드경제 http://news.heraldcorp.com/view.php?ud=20191219000737
컨슈머타임스 http://www.cstimes.com/?mod=news&act=articleView&idxno=324472
뉴스1 http://news1.kr/articles/?3797525
매일경제 https://www.mk.co.kr/news/business/view/2019/12/1066638/?a=1
이투데이 http://www.etoday.co.kr/news/view/1836358
업다운뉴스 http://www.updownnews.co.kr/news/articleView.html?idxno=212681