Bakar, H. A., M. Z. A. Abd. Aziz, B. H. Ahmad, N. Hassan, and H. A. Sulaiman. “Miniaturization of Broadband Right-Handed Circular Polarized (RHCP) Antenna Using 8 X 8 Square Loop Metasurfaces (MS)”. Journal of Telecommunication, Electronic and Computer Engineering (JTEC), vol. 10, no. 2-8, July 2018, pp. 151-4, https://jtec.utem.edu.my/jtec/article/view/4478.