Miastkowski, J., and R. Szczebiot. “Yield Surfaces and Criteria of Plastic Yielding for a Strain Hardening Material. Part 2. Theoretical Analysis”. Engineering Transactions 49, no. 1 (June 26, 2015): 99–108. Accessed January 17, 2026. http://et.ippt.gov.pl/index.php/et/article/view/576.