Hassan A. Ragheb, Shady Abd El-Aal, Afaf Saad, and Ahmed Zaalouk. “Dual-Band Printed Monopole Antenna Design”. Applied Computational Electromagnetics Society Journal (ACES), vol. 35, no. 10, Oct. 2020, pp. 1169-75, https://journals.riverpublishers.com/index.php/ACES/article/view/7673.