https://www.politico.eu/article/eu-uk-relations-rishi-sunak-brexit/
http://www.europarl.europa.eu/RegData/etudes/STUD/2017/602028/IPOL_STU(2017)602028_EN.pdf
https://theconversation.com/how-can-europe-meet-the-challenge-posed-by-the-retreat-of-the-us-274687
https://www.brookings.edu/blog/order-from-chaos/2020/07/14/putin-5-0/?utm_campaign=Brookings%20Brief&utm_medium=email&utm_content=91379993&utm_source=hs_email