https://www.berkshirehathaway.com/letters/2019ltr.pdf
https://www.crisisgroup.org/europe-central-asia/eastern-europe/ukraine/271-fraught-path-forward-ukraines-liberated-territories
https://www.nuffieldtrust.org.uk/news-item/privatisation-by-the-front-door-what-does-a-new-public-private-gp-model-mean
https://www.mckinsey.com/business-functions/strategy-and-corporate-finance/our-insights/a-better-way-to-anticipate-downturns?cid=other-eml-cls-mip-mck&hlkid=43c6066168d24ce48770cda86c18e473&hctky=&hdpid=5b2ed585-5c55-4c19-a844-02c1a823aa91