Mohammed, Miami A. “Birefringence for Elliptical-Core Fibers With Low Ellipticities”. Ibn AL-Haitham Journal For Pure and Applied Sciences 35, no. 1 (January 20, 2022): 39–49. Accessed April 30, 2025. https://www.jih.uobaghdad.edu.iq/index.php/j/article/view/2798.