Rizov, V. “Lengthwise Fracture of Two-Dimensional Functionally Graded Non-Linear Elastic Beam”. Technische Mechanik - European Journal of Engineering Mechanics 37, no. 1 (June 12, 2019): 48–61. Accessed May 7, 2024. https://journals.ub.ovgu.de/index.php/techmech/article/view/597.