Explicit Bounds of Eigenvalues for Stiffness Matrices by Quadratic Hierarchical Basis Method. Journal of Computational Mathematics, [S. l.], v. 21, n. 2, p. 113–124, 2003. Disponível em: https://global-sci.com/index.php/JCM/article/view/11536. Acesso em: 26 feb. 2026.