Zamir, Burhan, Aqib Nisar, and Babar Shahzad. “Electromagnetic Wave Propagation in a Parallel-Plate Waveguide Filled With Linear Metamaterials”. Research Prospects in Natural Sciences (RPNS) 1, no. 1 (December 27, 2023): 25–31. Accessed September 20, 2026. https://gsmarena.pk/index.php/rpns/article/view/68.