Fast Solution of Three-Dimensional Modified Helmholtz Equations by the Method of Fundamental Solutions. Communications in Computational Physics, [S. l.], v. 20, n. 2, p. 512–533, 2018. DOI: 10.4208/cicp.060915.301215a. Disponível em: https://global-sci.com/index.php/cicp/article/view/6356. Acesso em: 6 dec. 2025.