https://www.aspistrategist.org.au/the-real-winners-of-the-european-election/
https://www.lobbycontrol.de/wp-content/uploads/LobbyControl-Jahresbericht_20-21-210630-web2.pdf
https://www.socialeurope.eu/2017/06/trade-unions-and-the-decline-of-social-democracy/