http://pc.watch.impress.co.jp/docs/news/1045125.html

http://www.nikkei-science.com/201704_068.html

http://www.sankei.com/west/news/170314/wst1703140024-n1.html

https://headlines.yahoo.co.jp/hl?a=20170317-00000011-ryu-oki

http://souzokubible.com/certification-scheme/ https://profession-net.com/professionjournal/law-188/