- airpowerasia.blogspot.com 2012/11/pt-91-twardy-…PT-91 Twardy MBT is a derivation of T-72 main battle tank that's going for modernisation, replacing & upgrading of its's systems.
- tvd.im land-systems/2838-pt-91-twardy.htmlThe main battle tank of the Polish Army is the PT-91 "Twardy", which was developed from the T-72 MBT (T-72M1) popular during the Soviet era.
- unian.net war/pt-91-twardy-chto-eto-za-polskiy-…
- mil.in.ua en/news/117th-mechanized-brigade-armed-…The Armed Forces of Ukraine equipped the newly formed brigade with Polish PT-91 tanks in 2023. Twardy tanks were received by the 117th Mechanized Brigade...
- en.defence-ua.com industries/polish_pt_91_twardy_…Poland has sent a large batch of PT-91 Twardy tanks to Ukraine, the press secretary of the arms agency Krzysztof Płatek said.
- gagadget.com en/war/150329-ukraine-received-…Experiments have shown that the protection of PT-91 Twardy has increased by 30-70%.
- itc.ua articles/polskye-tanky-pt-91-twardy-…
- 24tv.ua ru/polsha-peredaet-ukraine-tanki-pt-91-…
- zikipedia.herokuapp.com wiki/PT-91_TwardyPT-91 Twardy Polonya yapımı ana muharabe tankıdır.