- owiki.org wiki/PT-91_TwardyPT-91 ''Twardy''. Production variant for Polish Army, extensively modernized development of T-72M1.
- stlfinder.com 3dmodels/pt-91-twardy-model/It’s created accurately, in real units of measurement, qualitatively and maximally close to the original. PT-91 Twardy 3D model cgtrader.
- rbc.ua ukr/news/tverdiy-ta-nadiyniy-shcho-vidomo-…
- globaldefensecorp.com 2022/09/05/ukraine-receives…Poland handed over PT-91 Twardy main battle tanks to Ukraine. This is yet another batch of military assistance to counter Russia’s aggression.
- forecastinternational.com archive/disp_pdf.cfm…A main battle tank. Sponsor. Poland's Ministry of National Defense sponsored the development and Polish Army procurement of the PT-91 Twardy.
- wblog.wiki tr/PT-91
- Üzerine PT-91E BUMAR en fuarı
- PT-91 Twardy, Varşova'daki askeri geçit töreninde 1. Zırhlı Tugaydan.
- Malezya Ordusuna ait PT-91M Pendekar sergileniyor.
- liquisearch.com pt-91_twardyPT-91 Twardy. The PT-91 Twardy ("hard","tough" or "resilient") is a Polish main battle tank. It is a development of the T-72M1 and first entered service in 1995.
- forums.civfanatics.com resources/pt-91-twardy.…PT-91 Twardy 2016-10-05. ... Is the polish main battle tank. A development of the T-72M1, it first entered service in 1995. twardy_lg_Qmq.jpg.
- defencedb.com profile_page.php…It has a width of 3.59 m, a height of 2.19 m, and a ground clearance of 0.395 m. PT-91 Twardy has a crew of three (3) persons.