http://ec.europa.eu/transport/sites/transport/files/pocketbook2016.pdf
http://www.economics-ejournal.org/economics/journalarticles/2017-10
https://www.opendemocracy.net/uk/sunny-hundal/millionaire-is-planning-to-spend-around-700000-to-target-pro-remain-mps-at-election?utm_source=Daily+Ne
http://www.ips-journal.eu/topics/european-union/article/show/eu-assurance-co-2037/
http://www.conservativehome.com/platform/2017/05/neale-richmond-no-deal-between-britain-and-the-eu-would-be-a-disaster-for-ireland.html
https://www.hrw.org/news/2017/05/15/eu-should-step-pressure-poland
http://www.migrationobservatory.ox.ac.uk/wp-content/uploads/2017/05/Commentary-net-and-election17.pdf
https://www.boeckler.de/pdf/p_imk_study_55_2017.pdf
http://www.europarl.europa.eu/RegData/etudes/STUD/2017/602028/IPOL_STU(2017)602028_EN.pdf
https://www.socialeurope.eu/2017/05/dismantling-democracy-eus-watch-poland-constitutional-tribunal/