https://www.understandingwar.org/sites/default/files/Ukraine%20Invasion%20Forecast%20Series%20Part%202%20ISW%20CT%20December%202021.pdf
https://archive.org/details/cobraiiinsidesto0000gord/page/382/mode/2up?view=theater
https://www.abc.net.au/news/2022-09-17/why-valdimir-putin-war-in-ukraine-is-going-badly/101439584#:~:text=Ukraine%20appears%20to%20have%20borrowed%20a%20US%20military,enemy%20territory%20and%20overrun%20the%20surprised%20defending%20forces.
https://www.understandingwar.org/backgrounder/russian-offensive-campaign-assessment-september-7
https://www.understandingwar.org/backgrounder/russian-offensive-campaign-assessment-september-8
https://www.understandingwar.org/backgrounder/russian-offensive-campaign-assessment-september-9
https://www.understandingwar.org/backgrounder/russian-offensive-campaign-assessment-september-10
https://www.military.com/history/original-thunder-run-was-way-clear-minefields.html
https://ig.ft.com/ukraine-counteroffensive/
https://www.reuters.com/world/europe/ukraine-must-demine-12000-km2-liberated-areas-kharkiv-region-official-2022-09-21/