
http://www.ilo.org/wcmsp5/groups/public/—dgreports/—cabinet/documents/genericdocument/wcms_371208.pdf

http://www.beaconforfreedom.org/liste.html?tid=415&art_id=475%20

https://theconversation.com/why-we-remember-the-source-of-an-opinion-better-than-the-source-of-a-fact-new-research-270579