Masood Mohamad, Huda, and Abdulghafoor Ibrahim Abdullah. “The Influence Of Hole Radius On The Properties Of Photonic Crystal Fiber”. Journal of Education and Science 21, no. 4 (December 1, 2008): 76–87. Accessed September 10, 2025. https://edusj.uomosul.edu.iq/index.php/edusj/article/view/42395.