https://publications.parliament.uk/pa/cm201719/cmselect/cmsctech/705/70503.htm#_idTextAnchor001
https://www.opendemocracy.net/uk/leanne-wood/fault-lines-of-welsh-politics-have-been-redrawn?utm_source=Daily+Newsletter&utm_campaign=970123e408-DAILY_NEWSLETTER_MAILCHIMP&utm_medium=email&utm_term=0_717bc5d86d-970123e408-407405485
http://www.conservativehome.com/platform/2017/05/neale-richmond-no-deal-between-britain-and-the-eu-would-be-a-disaster-for-ireland.html
https://home.kpmg.com/content/dam/kpmg/nl/pdf/2018/sector/overheid/impact-van-non-tarifaire-handelsbelemmeringen-als-gevolg-van-brexit.pdf