Nornikman, H., B.H. Ahmad, M.Z.A Abd. Aziz, A.R. Othman, and F. Malek. 2016. “Split Ring Resonator Structure on Microstrip Patch Antenna and Other Microwave Application Design: A Review”. Journal of Telecommunication, Electronic and Computer Engineering (JTEC) 7 (2):83-88. https://jtec.utem.edu.my/jtec/article/view/618.