http://blogs.lse.ac.uk/brexit/2017/09/28/the-eu-referendum-was-gerrymandered/
https://www.cesifo-group.de/DocDL/ifoDD_18-01_03-09_Ochsner.pdf
https://ec.europa.eu/commission/presscorner/api/files/attachment/867751/NA0620220ENN_002.pdf
https://publications.parliament.uk/pa/cm201719/cmselect/cmcumeds/365/365.pdf