https://curia.europa.eu/jcms/upload/docs/application/pdf/2018-12/cp180187en.pdf
https://www.dw.com/en/brexit-german-leaders-write-emotional-letter-to-britain/a-47132376
https://medium.com/@jonathanrowson/brexit-democracy-and-the-sacred-why-a-second-referendum-has-to-be-sacrificial-c1c4a84e853a
https://www.socialeurope.eu/wp-content/uploads/2019/01/03_Brexit_Kroeger.pdf
https://www.opendemocracy.net/uk/anthony-barnett/englishman-scotswoman-and-irishman-talk-about-brexit?utm_source=Daily+Newsletter&utm_campaign=d6dd65c541-DAILY_NEWSLETTER_MAILCHIMP&utm_medium=email&utm_term=0_717bc5d86d-d6dd65c541-407405485
https://blogs.sussex.ac.uk/uktpo/2018/12/17/organising-the-second-referendum/
http://blogs.lse.ac.uk/brexit/2018/09/25/brexit-has-become-unnegotiable-theresa-may-has-a-constitutional-duty-to-admit-that-truth/
https://ec.europa.eu/info/sites/info/files/com-2018-890-final.pdf
https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/761852/05_December-_EU_Exit_Attorney_General_s_legal_advice_to_Cabinet_on_the_Withdrawal_Agreement_and_the_Protocol_on_Ireland-Northern_Ireland.pdf
https://publications.parliament.uk/pa/cm201719/cmselect/cmexeu/1778/1778.pdf