https://publications.parliament.uk/pa/cm201719/cmselect/cmniaf/329/329.pdf
http://www.europarl.europa.eu/RegData/etudes/IDAN/2017/599352/EPRS_IDA%282017%29599352_EN.pdf
https://www.lrb.co.uk/v39/n18/swati-dhingra/how-not-to-do-trade-deals
https://blogs.lse.ac.uk/brexit/2019/12/03/a-missed-opportunity-revisiting-the-euro-referendum-that-never-was-from-a-historical-perspective/