Kreißig, R., and G. Grewolls. “Distortional Hardening Within a Cubic Yield Theory”. Technische Mechanik - European Journal of Engineering Mechanics 15, no. 4 (October 20, 2019): 333–339. Accessed December 5, 2025. https://journals.ub.ovgu.de/index.php/techmech/article/view/1277.