References
- Okada, K. 2014. Gaiko Wo Hiraku [Opening up Diplomacy]. Tokyo: Iwanami Shoten.
- US Department of Defense. 2010. Nuclear Posture Review. Washington DC: US Department of Defense. https://www.defense.gov/Portals/1/features/defenseReviews/NPR/2010_Nuclear_Posture_Review_Report.pdf
- US Department of Defense. 2018. Nuclear Posture Review. Washington DC: US Department of Defense. https://media.defense.gov/2018/Feb/02/2001872886/-1/-1/1/2018-NUCLEAR-POSTURE-REVIEW-FINAL-REPORT.PDF