ftp://ftp.unibocconi.it/pub/RePEc/bcu/papers/iefewp69.pdf
http://www.iata.org/whatwedo/Documents/economics/impact_of_brexit.pdf
https://www.omfif.org/analysis/commentary/2017/june/uk-risks-falling-behind-europe/
https://gupea.ub.gu.se/bitstream/2077/62155/1/gupea_2077_62155_1.pdf