https://ukandeu.ac.uk/wp-content/uploads/2019/12/Brexit-the-manifestos-uncovered.pdf
http://www.migrationobservatory.ox.ac.uk/resources/reports/unsettled-status-which-eu-citizens-are-at-risk-of-failing-to-secure-their-rights-after-brexit/
https://www.strategie.gouv.fr/sites/strategie.gouv.fr/files/atoms/files/fs-na-81-fiscalite-capital-01-10-2019.pdf