
https://blogs.lse.ac.uk/brexit/2021/02/04/indyref2-scottish-independence-would-be-2-3-times-more-costly-than-that-of-brexit-and-rejoining-the-eu-wouldnt-make-up-the-difference/

http://bruegel.org/wp-content/uploads/2017/03/WP_2017_03-.pdf

https://publications.parliament.uk/pa/cm201719/cmselect/cmexeu/935/935.pdf