
http://www.guengl.eu/uploads/news-documents/Working_paper_Border_controls_on_cross_border_trade_in_goods.pdf

http://www.irishnews.com/news/republicofirelandnews/2017/07/03/news/british-withdrawal-from-fishing-arrangement-unwelcome-and-unhelpful-says-irish-government-1073320/

https://www.bloomberg.com/news/features/2021-09-02/food-prices-driven-up-by-global-worker-shortage-brexit