https://theconversation.com/eu-citizens-proposal-a-lawyer-examines-the-detail-80111
https://ukandeu.ac.uk/wp-content/uploads/2020/06/Mind-the-values-gap.pdf
http://www.oecd.org/eco/outlook/economic-forecast-summary-united-kingdom-oecd-economic-outlook-june-2017.pdf
https://ec.europa.eu/commission/sites/beta-political/files/guiding-principles-dialogue-ei-ni_en.pdf