https://www.politico.eu/article/markus-soders-crumbling-empire/
https://www.politico.eu/article/jean-claude-juncker-ukraine-corruption-eu-accession/
http://www.diw.de/documents/publikationen/73/diw_01.c.562050.de/17-29.pdf
https://www.ips-journal.eu/topics/democracy-and-society/rien-ne-va-plus-1-7748/