* {{sourcefonte|idioma=en|url=https://www.aljazeera.com/news/2021/10/24/us-urges-n-korea-to-stop-missile-tests-and-return-to-talks|titletítulo=US urges N Korea to end ‘provocative’ tests, return to talks|authorautor=|pub=Al Jazeera|datedata=24 de outubro de 2021|archiveurlarquivourl=|idioma=en}}
* {{sourcefonte|idioma=en|url=https://www.youtube.com/watch?v=bjW2T-vLdlw&ab_channel=ArirangNews|titletítulo=U.S. special envoy Sung Kim arrives in S. Korea for talks on N. Korea issues|authorautor=Arirang News|pub=YouTube|datedata=23 de outubro de 2021|archiveurlarquivourl=|idioma=en}}
* {{sourcefonte|idioma=en|url=https://www.straitstimes.com/asia/east-asia/us-nuclear-envoy-sung-kim-visits-south-korea-amid-north-korea-missile-tension|titletítulo=US nuclear envoy Sung Kim visits South Korea amid North Korea missile tension|authorautor=|pub=The Straits Times|datedata=23 de outubro de 2021|archiveurlarquivourl=|idioma=en}}
* {{sourcefonte|idioma=en|url=https://www.state.gov/briefings/department-press-briefing-october-22-2021/#post-286094-NORTHKOREA|titletítulo=Department Press Briefing|authorautor=Ned Price|pub=Department of State|datedata=22 de outubro de 2021|archiveurlarquivourl=|idioma=en}}
* {{sourcefonte|idioma=en|url=https://www.youtube.com/watch?v=cVhblPFlNps&ab_channel=ArirangNews|titletítulo=UN Special Rapporteur urges UN sanctions on N. Korea be eased during pandemic|authorautor=Arirang News|pub=YouTube|datedata=22 de outubro de 2021|archiveurlarquivourl=|idioma=en}}
* {{sourcefonte|idioma=en|url=https://www.youtube.com/watch?v=I9AepJa2sRU&ab_channel=PyongyangBroadcastService-D.P.RofKorea.|titletítulo=DPRK Test New Submarine Ballistic Missile|authorautor=Pyongyang Broadcast Service - D.P.R of Korea|pub=YouTube|datedata=20 de outubro de 2021|archiveurlarquivourl=|idioma=en}}
* {{sourcefonte|idioma=en|url=https://kcnawatch.org/newstream/1632886875-742443353/hypersonic-missile-newly-developed-by-academy-of-defence-science-test-fired/|titletítulo=Hypersonic Missile Newly Developed by Academy of Defence Science Test-fired|authorautor=|pub=Rodong Sinmun|datedata=29 de setembro de 2021|archiveurlarquivourl=|idioma=en}}
* {{sourcefonte|idioma=en|url=https://www.reuters.com/business/aerospace-defense/skorea-successfully-tests-submarine-launched-ballistic-missile-blue-house-2021-09-15/|titletítulo=S.Korea says it successfully tests submarine-launched ballistic missile|authorautor=Hyonhee Shin|pub=Reuters|datedata=15 de setembro de 2021|archiveurlarquivourl=|idioma=en}}
