https://www.ipg-journal.de/regionen/europa/artikel/detail/wind-in-ihren-segeln-4625/
https://undocs.org/en/A/CONF.231/3
https://www.socialeurope.eu/2017/05/smooth-brexit-interests-germany-much-uk/
https://www.gov.uk/guidance/status-of-eu-nationals-in-the-uk-what-you-need-to-know