https://www.global-counsel.co.uk/sites/default/files/analysis/insight/download/Hard%20and%20Soft%20Political%20Risk.pdf
http://www.ips-journal.eu/topics/european-union/article/show/eu-assurance-co-2037/
https://focusweb.org/wp-content/uploads/2021/02/FGS_PB-1_rev-2.pdf