https://www.ajot.com/news/the-brexit-checklist-where-the-u.k.-and-eu-currently-stand
https://www.esri.ie/system/files/publications/RS185_0.pdf
https://ec.europa.eu/home-affairs/sites/homeaffairs/files/e-library/documents/policies/organized-crime-and-human-trafficking/corruption/docs/acr_2014_en.pdf
http://www.migrationobservatory.ox.ac.uk/resources/commentaries/brexodus-migration-and-uncertainty-after-the-eu-referendum/