http://itpro.nikkeibp.co.jp/atcl/column/14/346926/011501275/?itp_pickup&rt=nocnt

https://dot.asahi.com/aera/2018011600080.html

https://headlines.yahoo.co.jp/hl?a=20180120-00000029-mai-soci

https://headlines.yahoo.co.jp/hl?a=20180119-00000047-mai-soci

https://facta.co.jp/blog/archives/20180118001371.html https://facta.co.jp/article/201802027.html