https://www.brookings.edu/research/a-post-american-europe-and-the-future-of-u-s-strategy/
https://www.bloomberg.com/news/articles/2017-06-14/ryanair-easyjet-say-soft-brexit-won-t-address-airline-concerns?cmpid=BBBXT061517_BIZ&utm_medium=email&utm_source=newsletter&utm_term=170615&utm_campaign=brexit
https://rusi.org/sites/default/files/briefingpaper-france-uk-2017.pdf
http://tdem.eu/