Is Pollution Effect of Finite Difference Schemes Avoidable for Multi-Dimensional Helmholtz Equations with High Wave Numbers?. Commun. Comput. Phys. [Internet]. 2018 Apr. 8 [cited 2025 Dec. 6];21(2):490-514. Available from: https://www.global-sci.com/index.php/cicp/article/view/6410