http://www.cer.org.uk/sites/default/files/insight_js_st_9.6.17.pdf
https://www.niesr.ac.uk/sites/default/files/publications/NIESR%20Report%20Brexit%20-%202018-11-26.pdf
http://europa.eu/rapid/press-release_MEMO-17-2001_en.htm
http://www.fdf.org.uk/news.aspx?article=8062