https://www.militaryfactory.com/aircraft/compare-aircraft-results.asp?aircraft1=23&aircraft2=782
https://en.wikipedia.org/wiki/Lockheed_Martin_F-35_Lightning_II
https://en.wikipedia.org/wiki/Sukhoi_Su-57
https://www.militaryfactory.com/aircraft/compare-aircraft-results.asp?aircraft1=782&aircraft2=20
https://www.globalsecurity.org/military/systems/aircraft/f-22-cost.htm
https://bulgarianmilitary.com/2019/11/01/dogfight-russias-su-35-and-su-57-vs-f-35-stealth-fighter-jet/
https://nationalinterest.org/blog/buzz/russia-vs-america-f-35s-vs-putins-best-fighters-who-wins-92381
https://www.businessinsider.com/su-57-russia-testing-new-stealth-fighter-engine-2017-12
https://www.ainonline.com/aviation-news/defense/2020-01-28/kremlin-confirms-su-57-commitment-foreign-orders-loom
https://aviatia.net/f-35-lightning-ii-vs-sukhoi-pak-fa/