M. C. Lim, S. K. A. Rahim, M. R. Hamid, P. J. Soh, M. I. Sabran, A. A. Eteng and M. R. Ramli (2021) “Single-, Dual- and Wide-Band Frequency-Reconfigurable Antenna with Annular Ring Slots”, Applied Computational Electromagnetics Society Journal (ACES), 32(11), pp. 987–993. Available at: https://journals.riverpublishers.com/index.php/ACES/article/view/9433 (Accessed: 31 May 2026).