Variants
Samsung Techwin signs deal for delivering 120 K9 Thunder self-propelled howitzers to Poland | December 2014 global defense security news UK | Defense Security Global news Industry army 2014
http://www.armyrecognition.com/december_2014_global_defense_security_news_uk/samsung_techwin_signs_deal_for_delivering_120_k9_thunder_self-propelled_howitzers_to_poland.html
Development
Ministry of Defence | Defence News | Army to get new precision "search and destroy" anti-armour weapon
https://web.archive.org/web/20071211233430/http://www.mod.uk/DefenceInternet/DefenceNews/EquipmentAndLogistics/ArmyToGetNewPrecisionsearchAndDestroyAntiarmourWeapon.htm404 - Not Found
http://www.mod.uk/DefenceInternet/DefenceNews/EquipmentAndLogistics/ArmyToGetNewPrecisionsearchAndDestroyAntiarmourWeapon.htmWayback Machine - Wikipedia
https://en.wikipedia.org/wiki/Wayback_Machine155MM Study Looks To Pack More Punch Into The Royal Navy's Fleet - BAE Systems
https://web.archive.org/web/20120212183534/http://www.baesystems.com/Newsroom/NewsReleases/autoGen_1071114103911.htmlHome
http://www.baesystems.com/Newsroom/NewsReleases/autoGen_1071114103911.html
History
Ancile
http://www.deagel.com/Self-Propelled-Howitzers/AS90_a000472001.aspxBritish Army’s AS90 howitzers to stick around amid replacement delay
https://www.defensenews.com/land/2020/07/29/british-armys-as90-howitzers-to-stick-around-amid-replacement-delay/