Bochniak, W., and A. Korbel. “Extrusion of CuZn39Pb2 Alloy by the KOBO Method”. Engineering Transactions 47, no. 3-4 (June 26, 2015): 351–367. Accessed June 9, 2025. https://et3.ippt.pan.pl/index.php/et/article/view/637.