1. Johnson, R. 2020. “50 Years of the Non-proliferation Treaty: Strengthening the NPT in the Face of Iranian and North Korean Nonproliferation Challenges.” Testimony before US House Committee on Foreign Affairs Subcommittees on the Middle East, North Africa, and International Terrorism, and Asia, the Pacific and Nonproliferation, March 3. Accessed 13 August 2020. https://www.nti.org/newsroom/news/ntis-richard-johnson-testifies-congress-strengthening-npt/
2. Kane, C., S. C. Lieggi, and M. A. Pomper. 2020. “Time for Leadership: South Korea and Nuclear Nonproliferation.” Arms Control Today. Accessed 13 August 2020. https://www.armscontrol.org/act/2011-03/time-leadership-south-korea-nuclear-nonproliferation
3. NTI. 2005. “Taiwan and Nonproliferation.” NTI Issue Brief, May 1. Accessed 13 August 2020. https://www.nti.org/analysis/articles/taiwan-and-nonproliferation/
4. Conceptual Twist of Japanese Nuclear Policy: Its Ambivalence and Coherence Under the US Umbrella