High Order Compact Finite Difference Schemes for the Helmholtz Equation with Discontinuous Coefficients. Journal of Computational Mathematics, [S. l.], v. 29, n. 3, p. 324–340, 2018. DOI: 10.4208/jcm.1010-m3204. Disponível em: https://gsp.tricubic.dev/JCM/article/view/12038. Acesso em: 14 mar. 2026.