Alluri, Srinivasarao, and Nakkeeran Rangaswamy. “A Super Wideband Circular-Shaped Fractal Antenna Loaded With Concentric Hexagonal Slots”.
International Journal of Engineering and Technology, vol. 7, no. 3.29, Aug. 2018, pp. 211-3,
https://doi.org/10.14419/ijet.v7i3.29.18797.