https://www.cer.eu/sites/default/files/insight_SL_5.11.19_2.pdf
http://www.epc.eu/documents/uploads/pub_7788_whatnowoptionsforbrexit.pdf?cmpid=BBBXT061617_BIZ&utm_medium=email&utm_source=newsletter&utm_term=170616&utm_campaign=brexit
https://www.wto.org/english/res_e/booksp_e/wtr23_e/wtr23_e.pdf
https://www.theatlantic.com/international/archive/2019/10/brexit-journalism-failure/600580/