M. Mohammad, Huda, Nawfal Y. Jamil, and Abdulghafoor I. Abdullah. “Photonic Bandgap Tuning of Photonic Crystals by Air Filling Fraction”. Rafidain Journal of Science 24, no. 9 (September 1, 2013): 96–102. Accessed September 10, 2025. https://edusj.uomosul.edu.iq/index.php/rsci/article/view/47454.