https://apps.dtic.mil/sti/pdfs/AD1092439.pdf
https://apps.dtic.mil/sti/pdfs/ADA555143.pdf
https://fas.org/issues/nuclear-weapons/status-world-nuclear-forces/
https://media.defense.gov/2022/Oct/27/2003103845/-1/-1/1/2022-NATIONAL-DEFENSE-STRATEGY-NPR-MDR.PDF
https://www.csis.org/analysis/us-nuclear-warhead-modernization-and-new-nuclear-weapons
https://nationalinterest.org/blog/reboot/controversy-behind-navys-new-w76-2-tactical-nuclear-warheads-182082
https://www.19fortyfive.com/2022/02/russia-has-a-massive-stockpile-of-tactical-nuclear-weapons/