http://bunshun.jp/articles/-/7221

https://www.amazon.co.jp/-/dp/4534056486

https://www.shinmai.co.jp/news/nagano/20181130/KT181129FTI090024000.php

https://headlines.yahoo.co.jp/hl?a=20181202-00000060-mai-soci

https://headlines.yahoo.co.jp/hl?a=20181203-00000513-san-soci https://headlines.yahoo.co.jp/hl?a=20181203-00000026-asahi-soci