http://foodresearch.org.uk/wp-content/uploads/2016/03/Food-and-Brexit-briefing-paper-2.pdf
https://publications.parliament.uk/pa/ld201719/ldselect/ldeucom/9/9.pdf
http://carnegieeurope.eu/2017/06/15/bringing-brexit-back-to-reality-pub-71262
https://www.cesifo-group.de/DocDL/ifoDD_18-01_03-09_Ochsner.pdf