https://openmigration.org/en/op-ed/how-immigrants-are-saving-the-italian-economy-and-pensions/
http://www.cesifo-group.de/ifoHome/publications/working-papers/CESifoWP/CESifoWPdetails?wp_num=6452&CESifoWP.search=+
https://www.theguardian.com/politics/2017/may/04/brexit-talks-leadership-vacuum-leaves-45-chance-of-no-deal
https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:52024DC0075