Meier, H. A., P. Steinmann, and E. Kuhl. “Towards Multiscale Computation of Confined Granular Media: Contact Forces, Stresses and Tangent Operators”. Technische Mechanik - European Journal of Engineering Mechanics 28, no. 1 (July 30, 2019): 32–42. Accessed May 13, 2024. https://journals.ub.ovgu.de/index.php/techmech/article/view/825.