$H^2$-Conforming Methods and Two-Grid Discretizations for the Elastic Transmission Eigenvalue Problem. Communications in Computational Physics, [S. l.], v. 28, n. 4, p. 1366–1388, 2020. DOI: 10.4208/cicp.OA-2019-0171. Disponível em: https://global-sci.com/index.php/cicp/article/view/6883. Acesso em: 5 dec. 2025.