K21 (English Wikipedia)

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defensetoday.kr

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eos-aus.com

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ghostarchive.org

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hanwha-defense.co.kr

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milmag.pl

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spnews.co.kr

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turkiyetoday.com

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web.archive.org

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복합재 동체 Archived 5 July 2015 at the Wayback Machine 복합재 방호판 Archived 5 July 2015 at the Wayback Machine Dacc Co., Ltd
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CMI Defence and Doosan DST Present a New 120/105mm Medium Tank Concept Archived 14 January 2016 at the Wayback Machine - CMIgroupe.com, 18 February 2013
K21-105^[usurped] - Military-Today.com

youtube.com

K21-105 Medium Tank (경전차), 30 April 2021, archived from the original on 21 December 2021, retrieved 6 October 2021