Sharkawy, M. A. ., O. . Luxor, A. . Boutejdar, and F. . Alhefnawi. “Improvement of Compactness of Lowpass/Bandpass Filter Using a New Electromagnetic Coupled Crescent Defected Ground Structure Resonators”. Applied Computational Electromagnetics Society Journal (ACES), vol. 25, no. 7, June 2022, pp. 570-7, https://journals.riverpublishers.com/index.php/ACES/article/view/15721.