http://www.consilium.europa.eu/en/press/press-releases/2017/04/29-euco-brexit-guidelines/
https://www.theguardian.com/politics/2017/apr/19/gina-miller-best-for-britain-tactical-voting-against-hard-brexit?CMP=share_btn_link
https://www.bloomberg.com/politics/articles/2017-04-27/merkel-warns-against-u-k-illusions-in-hard-line-brexit-speech?utm_content=brexit&utm_campaign=socialflow-organic&utm_source=twitter&utm_medium=social&cmpid%3D=socialflow-facebook-brexit
https://www.opendemocracy.net/uk/jeremy-gilbert/forty-years-of-failure-how-to-challenge-narrative-of-hard-brexit
https://www.ajot.com/news/the-brexit-checklist-where-the-u.k.-and-eu-currently-stand
http://uk.reuters.com/article/us-britain-eu-negotiations-idUKKBN17R1XJ