https://www.socialeurope.eu/2017/05/irelands-brexit-borders-possible-solution/
http://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?uri=CELEX:12016P/TXT&from=EN
Public policies are introduced for different reasons. Sometimes, it is because a problem is ...
https://fullfact.org/europe/uk-law-what-proportion-influenced-eu/
https://corporateeurope.org/sites/default/files/driving_into_disaster_report_final_0.pdf
http://ec.europa.eu/transport/sites/transport/files/eu_air_carriers_by_country_holding_an_active_operating_licence.pdf
https://www.socialeurope.eu/2017/05/dismantling-democracy-eus-watch-poland-constitutional-tribunal/
https://www.bertelsmann-stiftung.de/en/publications/publication/did/social-justice-in-the-eu-index-report-2016/
http://www.aviationlaw.eu/wp/wp-content/uploads/2013/09/Freedoms-of-the-Air-Explained.pdf
https://www.theengineer.co.uk/how-the-uk-aerospace-can-fly-post-brexit/