https://www.msn.com/en-in/news/world/how-much-has-russia-spent-on-ukraine-war-a-quarter-of-its-annual-budget/ar-AA14zd2e
https://www.macrotrends.net/countries/RUS/russia/military-spending-defense-budget#:~:text=Russia%20Military%20Spending%2FDefense%20Budget%20-%20Historical%20Data%20,%20%203.69%25%20%2025%20more%20rows%20
https://www.newsweek.com/russias-spending-155-million-hour-ukraine-war-1707872
https://www.reuters.com/world/europe/more-than-100000-russian-military-casualties-ukraine-top-us-general-2022-11-10/
https://www.oryxspioenkop.com/2022/02/attack-on-europe-documenting-equipment.html
https://www.state.gov/fact-vs-fiction-russian-disinformation-on-ukraine/
https://www.nytimes.com/live/2022/10/11/world/russia-ukraine-war-news#:~:text=Ukraine%20has%20an%20extensive%20network%20of%20local%20air,and%20they%20cannot%20stop%20all%20incoming%20Russian%20attacks.
https://www.politico.com/news/2022/09/19/ukraine-has-shot-down-55-russian-warplanes-00057569
https://news.yahoo.com/ukrainian-air-force-explains-kind-102306317.html?guccounter=1&guce_referrer=aHR0cHM6Ly93d3cuYmluZy5jb20v&guce_referrer_sig=AQAAAGt506rIUpROfxtChX4Ph1REyWnob5fN3HG0OxWYG01Jq1afgfqxDEJehZ2qTAa1N-gfviLhevfRAJ1MX5fmLfAHV2Cf0VqApEm_JShR_g2vQWv_Djwa02ri10ShPHUxXqqnFHXW5255aRHtAeplCNZU0x34gARId6BcQ_RteYTL
https://warontherocks.com/2022/04/what-artillery-and-air-defense-does-ukraine-need-now/#:~:text=Artillery%2C%20precision%20aircraft%20strikes%2C%20and%20long-range%20missiles%20continue,using%20Javelins%20to%20stop%20tanks%20in%20their%20tracks.
https://rusi.org/explore-our-research/publications/special-resources/russian-air-war-and-ukrainian-requirements-air-defence
https://warsearcher.com/2022/05/11/russian-black-sea-fleet-2022-war-losses/#:~:text=In%20the%20Black%20Sea%E2%80%99s%20confined%20area%20of%20operations%2C,units%20now%20present%20in%20the%20Mediterranean%20or%20elsewhere.%2A%2A
https://news.usni.org/2022/11/07/russian-navy-pulls-warships-from-black-sea-into-port-after-attacks