https://visegradinsight.eu/more-visible-europe-union-eu-germany/
https://www.ipg-journal.de/regionen/europa/artikel/detail/national-oekologisches-patchwork-3976/
https://onlinelibrary.wiley.com/doi/10.1111/jcms.13415
http://www.euronews.com/2017/06/23/who-s-afraid-of-brexit?utm_source=newsletter&utm_medium=en&utm_content=who-s-afraid-of-brexit&_ope=eyJndWlkIjoiZjU3Y2JhYmUwMGUxZDFiNTUxOTU1ZDljNzExNTI1MmEifQ==