- http://kabumatome.doorblog.jp/archives/65911566.html
- http://kabumatome.doorblog.jp/archives/65911584.html
- http://kabumatome.doorblog.jp/archives/65911677.html
- http://kabumatome.doorblog.jp/archives/65911757.html
- http://d.hatena.ne.jp/Kango/20180126/1517012654
- https://news.yahoo.co.jp/byline/yamamotoichiro/20180202-00081158/