Bonnet, Marc, and Bojan B. Guzina. “Topological Derivative Applied to Cavity Identification from Elastodynamic Surface Measurements”. European Journal of Computational Mechanics 13, no. 5-7 (July 17, 2004): 425–436. Accessed November 15, 2024. https://journals.riverpublishers.com/index.php/EJCM/article/view/2289.