https://www.bruegel.org/analysis/defending-europe-without-us-first-estimates-what-needed
http://www.egmontinstitute.be/content/uploads/2019/03/SPB108.pdf?type=pdf
https://verfassungsblog.de/herkules-oder-sisyphus-vom-erbe-des-gesetzlichen-unrechts-im-post-autokratischen-polen/
https://www.crisisgroup.org/global/three-troubling-trends-un-security-council?utm_source=Sign+Up+to+Crisis+Group%27s+Email+Updates&utm_campaign=9969c0ae04-EMAIL_CAMPAIGN_2019_11_06_12_13&utm_medium=email&utm_term=0_1dab8c11ea-9969c0ae04-359810589