http://www.nichibenren.or.jp/library/ja/publication/booklet/data/gyakutai_pam_160405.pdf http://www.nichibenren.or.jp/jfba_info/publication/pamphlet.html#pam_04_children

http://www.asahi.com/articles/ASJ4D3JSLJ4DUTIL01D.html

http://news.goo.ne.jp/article/chuplus/region/chuplus-CK2016042702000040.html

http://headlines.yahoo.co.jp/hl?a=20160502-00000068-san-soci

http://nakamuramakoto.blog112.fc2.com/blog-entry-268.html