https://www.bruegel.org/wp-content/uploads/2021/09/PC-2021-18-0909.pdf
https://www.imf.org/external/pubs/ft/fandd/2021/12/pdf/Kimball.pdf
https://www.eca.europa.eu/Lists/ECADocuments/REW19_09/REW_EU-defence_EN.pdf
https://committees.parliament.uk/publications/23257/documents/169721/default/