https://verfassungsblog.de/with-exclusive-competence-comes-great-responsibility/
https://knowledge.wharton.upenn.edu/article/can-election-polls-be-trusted/
https://www.project-syndicate.org/onpoint/the-g20-s-role-reversals-2017-07?utm_source=Project+Syndicate+Newsletter&utm_campaign=324c117b44-op_newsletter_2017_7_7&utm_medium=email&utm_term=0_73bad5b7d8-324c117b44-105765449&barrier=accessreg
https://www.opendemocracy.net/kamil-matuszczyk/migration-crisis-in-2017-challenges-for-eu-solidarity