Voyiadjis, G.Z., R.K. Abu Al-Rub, and A.N. Palazotto. 2003. “Non-Local Coupling of Viscoplasticity and Anisotropic Viscodamage for Impact Problems Using the Gradient Theory”. Archives of Mechanics 55 (1): 39-89. https://am.ippt.pan.pl/index.php/am/article/view/v55p39.