https://www.cer.eu/sites/default/files/insight_SL_5.11.19_2.pdf
https://www.instituteforgovernment.org.uk/sites/default/files/publications/IfG_views-eu-27-v5_WEB.pdf
https://www.rand.org/pubs/research_reports/RR2200.html
https://www.bruegel.org/first-glance/energy-shock-which-there-no-playbook