Coutelli, Daniel, Claire Gauthir, Yves Ravalard, Xiaomin Ni, and Eberhard Haug. 1998. “Un Element multi~materiaux Pour I’ Etude Du Comportement En Crash Des Structures Stratifiees : Synthese Et Perspectives”. European Journal of Computational Mechanics 7 (1-3):177-92. https://journals.riverpublishers.com/index.php/EJCM/article/view/3399.