Ahmad M, Kasilingam D. Three-Dimensional Modeling of Wave Propagation over Different Types of Terrains and Environments Using the Parabolic Equation Solved by Higher Order Approximation of the Finite Difference Method. IJEEI [Internet]. 2021 May 31 [cited 2026 Oct. 28];9(2):417-25. Available from: https://section.iaesonline.com/index.php/IJEEI/article/view/2845