https://journals.sagepub.com/doi/epub/10.1177/14651165231193830
http://visionofhumanity.org/app/uploads/2017/06/GPI-2017-Report-1.pdf
https://www.socialeurope.eu/2017/06/mercron-franco-german-tandem-back-berlins-terms/
https://www.nzz.ch/international/radikales-regime-wie-sich-der-kreml-unter-wladimir-putin-radikalisierte-ld.1755674?reduced=true