
http://www.guengl.eu/uploads/publications-documents/NSkoutarisGUENGLReportC_%28002%29.pdf

https://socialeurope.eu/brexit-why-does-northern-ireland-matter-so-much

https://www.parliament.uk/documents/commons-committees/culture-media-and-sport/Background%20paper%20-%202016%20Referendum%20Expenses%20Opinion%20-%20Matrix%20Chambers.pdf