G. Starzyński and W. Gambin, “Yield Stress Distribution in the Natural Surface Layer of Polycrystals”, Eng. Trans., vol. 44, no. 2, pp. 143–156, Jul. 1996, Accessed: Apr. 24, 2025. [Online]. Available: https://et3.ippt.pan.pl/index.php/et/article/view/1455