M. Mohammad, Huda, هدى, Nawfal Y. Jamil, نوفل, Abdulghafoor I. Abdullah, and عبد. “Photonic Bandgap Tuning of Photonic Crystals by Air Filling Fraction”. Rafidain Journal of Science 24, no. 9 (June 24, 2025): 96–102. Accessed August 7, 2025. https://ojs.uomosul.edu.iq/index.php/rsci/article/view/12783.