https://www.politico.eu/article/spain-and-uk-reach-eleventh-hour-deal-to-avoid-a-hard-border-in-gibraltar/
https://reliefweb.int/attachments/66a09358-2cf3-448c-846a-d29f9f8f768c/62a9d1494.pdf
http://www.ipg-journal.de/regionen/europa/artikel/detail/ein-bisschen-mehr-als-freundschaft-2458/