A Saddle Point Numerical Method for Helmholtz Equations. Journal of Computational Mathematics, [S. l.], v. 35, n. 1, p. 19–36, 2018. DOI: 10.4208/jcm.1604-m2014-0136. Disponível em: https://global-sci.com/index.php/JCM/article/view/12259. Acesso em: 5 dec. 2025.