Sixth-Order Compact Finite Difference Method for 2D Helmholtz Equations with Singular Sources and Reduced Pollution Effect. Communications in Computational Physics, [S. l.], v. 34, n. 3, p. 672–712, 2023. DOI: 10.4208/cicp.OA-2023-0062. Disponível em: https://www.global-sci.com/index.php/cicp/article/view/7201. Acesso em: 5 dec. 2025.