` :Your source is; ``T-90``. btvt.narod.ru. Retrieved April 11, 2014. ``Модернизированный танк Т-90С ``Тагил`` во всей красе``. Retrieved 15 November 2014. John Pike. ``T-90``. Retrieved 15 November 2014. However last two have same figure as global security, and BTVT is not reliable source for Russian armour protection, although it does have a lot of information about Russian armors. For example, BTVT claims that the protection of M1A1 abrams is 400~450mm KE, but in reality it was 600mm according to Steven Zaloga and the Soviet Intelligence.  `