Muhammed, Nadia Fateh, Aseel Ibrahim, and Shehab Ahmad Kahdum. “Numerical Study of Solid Core Photonic Crystal Fibres With Endlessly Single Mode”. Ibn AL-Haitham Journal For Pure and Applied Sciences 31, no. 3 (November 25, 2018): 33–42. Accessed March 14, 2025. https://jih.uobaghdad.edu.iq/index.php/j/article/view/2025.