https://www.gov.uk/government/news/pms-open-letter-to-eu-citizens-in-the-uk
http://fedtrust.co.uk/after-the-election-comes-the-painful-brexit-reality/
http://www.reuters.com/article/us-britain-eu-verhofstadt-idUSKBN19V0WP
http://www.acea.be/uploads/publications/ACEA_position_paper-Brexit.pdf