Sarin, V. P., M. P. Jayakrishnan, C. K. Aanandan, M. Pezholil, and V. Kesavath. “A Metamaterial Backed Dipole Antenna for High Gain Directional Communications”. Advanced Electromagnetics, vol. 5, no. 1, Mar. 2016, pp. 9-14, doi:10.7716/aem.v5i1.328.