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https://www.globallegalinsights.com/practice-areas/bribery-and-corruption/global-legal-insights—bribery-and-corruption/germany
http://bruegel.org/2015/05/corruptionomics-in-italy/
http://www.irishtimes.com/opinion/a-shared-space-solution-to-ireland-s-brexit-border-problem-1.3022440
https://www.socialeurope.eu/2017/05/irelands-brexit-borders-possible-solution/
http://www.res.org.uk/view/art4Apr17Features.html
http://www.rug.nl/research/portal/files/41711829/cesifo1_wp6448.pdf
http://voxeu.org/system/files/epublication/Brexit_Beckons_VoxEU.pdf
http://sprc.info/wp-content/uploads/2012/07/Polish-Migrants-in-London-extending-the-stay.pdf
http://www.conservativehome.com/parliament/2016/04/theresa-mays-speech-on-brexit-full-text.html