“Guiding Properties of the Ge-Based Square Lattice Photonic Crystal Fibers”, Int. J. Curr. Eng. Technol., vol. 15, no. 3, pp. 239–243, Jun. 2025, Accessed: Mar. 12, 2026. [Online]. Available: https://ijcet.evegenis.org/index.php/ijcet/article/view/1666