https://www.whitehouse.gov/wp-content/uploads/2021/05/budget_fy22.pdf
https://www.eca.europa.eu/Lists/ECADocuments/REW19_09/REW_EU-defence_EN.pdf
Procurement Bill [HL] – Hansard – UK Parliament
https://openknowledge.worldbank.org/bitstream/handle/10986/38045/9781464819025.pdf?sequence=5&isAllowed=y