https://euagenda.eu/upload/publications/untitled-124549-ea.pdf
https://ep00.epimg.net/descargables/2018/05/24/bfe9a6898e6b41480fd9d57aff93bc10.pdf
http://berlinpolicyjournal.com/detour-deurope/
http://news.sky.com/story/theresa-may-theres-no-economic-case-for-breaking-up-the-uk-10787816