https://www.brookings.edu/wp-content/uploads/2018/03/fp_20180316_future_political_warfare.pdf
https://blogs.lse.ac.uk/brexit/2020/02/28/fog-in-belfast-a-hundred-years-of-uneasiness-and-no-end-in-sight/
https://www.lobbycontrol.de/2021/06/weitere-kritik-am-wirtschaftsrat-der-cdu/?pk_source=nl&pk_campaign=20210617
http://www.ey.com/Publication/vwLUAssets/EY-UK-EU-Working-through-uncertainty/%24FILE/EY-UK-EU-Working-through-uncertainty-considerations-for-Financial-Institutions.pdf