
https://ec.europa.eu/commission/commissioners/2014-2019/andriukaitis/blog/likening-eu-ussr-not-unreasonable_en

https://www.gov.uk/government/news/programme-for-fourth-round-of-uk-eu-article-50-negotiations

https://publications.parliament.uk/pa/cm201719/cmselect/cmfaff/514/514.pdf