https://sipri.org/sites/default/files/2017-09/yb17-summary-eng.pdf
https://www.bloomberg.com/graphics/2015-innovative-countries/
https://dgap.org/system/files/article_pdfs/DPC%20-%20fully%20study%202023%20-%20final.pdf
https://journals.sagepub.com/doi/pdf/10.1177/00187267231218430