The Coupling of Finite Element Method and Boundary Element Method for Two-Dimensional Helmholtz Equation in an Exterior Domain. Journal of Computational Mathematics, [S. l.], v. 5, n. 1, p. 21–37, 1987. Disponível em: https://global-sci.com/index.php/JCM/article/view/10860. Acesso em: 5 dec. 2025.