FINITE ELEMENT SOLUTION OF A RADIATION/PROPAGATION PROBLEM FOR A HELMHOLTZ EQUATION WITH A COMPACTLY SUPPORTED NONLINEARITY. Far East Journal of Applied Mathematics, [S. l.], v. 116, n. 4, p. 311–356, 2023. DOI: 10.17654/0972096023016. Disponível em: https://pphmjopenaccess.com/fejam/article/view/915. Acesso em: 5 jan. 2026.