http://www.rug.nl/research/portal/files/41711829/cesifo1_wp6448.pdf
https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/680185/Governor_letter_to_CX_-_Feb_2018.pdf
http://www.ecfr.eu/article/commentary_the_brexit_threat_to_britains_defence_industry
https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/640485/Technical_note_on_Functionality_and_Protocol_7.pdf